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October 28, 2026 · 8 min read

What Apostasy (Riddah) Is in Islamic Law

This guide explains what classical Islamic law means by apostasy, in Arabic or , and the conditions the jurists attached to it. It describes the law as the scholars wrote it. It does not advocate anything, and it is not a ruling about you. If you are reading because you are frightened about your own situation, please read the section near the end first, and know that doubting is not apostasy in any school of law.

The word and the definition

The Arabic root r-d-d means to turn back or return. The Qur’an uses the verb for turning back from one’s religion: “whoever of you turns back from his religion and dies while a disbeliever, their deeds have become worthless in this world and the Hereafter” (2:217). The person who does so is the murtadd, the one who has turned back, which is where this site takes its name.

The jurists gave a short definition. Ibn Qudama, the jurist of the twelfth and thirteenth centuries, opens the chapter on the apostate in al-Mughni with it: the apostate is the one who returns from the religion of Islam to disbelief.1 Every school uses a definition of this kind. What matters in practice is the conditions, because the conditions decide who the definition can apply to.

The conditions: who can be an apostate in law

The classical schools agree on a set of conditions before a person can be treated as an apostate. They are stated in different words in different books, but their substance is shared.

Adulthood. The person must have reached legal maturity. Ibn Qudama’s statement of the rule begins with an apostate “who is adult and of sound mind”.1 A child’s words do not have this legal effect.

Sound mind. The person must be sane. The insane are outside legal responsibility altogether. The jurists debated cases at the edge of this condition, such as a person who is intoxicated. Ibn Qudama reports that the Hanbali school has two narrations from Ahmad on this, and that Abu Hanifa held that the apostasy of the intoxicated is not valid, because it depends on belief and intention and the intoxicated person has neither.2

Free choice. A person forced to say words of disbelief is not an apostate. The Qur’an makes the exception itself: “except for one who is forced while his heart is secure in faith” (16:106). The same principle runs the other way. Ibn Qudama discusses a non-Muslim under protection who is forced to accept Islam, and holds that the conversion has no legal effect, because he was compelled to something it is forbidden to compel, citing “there is no compulsion in religion” (2:256).3

Knowledge and intention. The jurists distinguished between a person who knowingly rejects something known to be part of the religion and a person who is ignorant, mistaken, or interpreting. They spent a great deal of ink on how to treat people who held wrong beliefs through interpretation, and many declined to declare them outside Islam. Ibn Qudama notes, for example, that most jurists did not declare the Kharijites unbelievers, even though they shed Muslim blood believing it lawful.4

What counts as apostasy, and what does not

The legal manuals list the acts and statements by which a person might leave Islam: explicitly renouncing it, denying God or a prophet, denying something known by everyone to be part of the religion, or mocking God or the Qur’an. These lists are long, and reading them out of context is frightening. Read in context, three things stand out.

First, the lists describe a deliberate act by a responsible person. They are not lists of thoughts. Islamic law does not hold people to account for what passes through their minds. The Prophet told Companions troubled by thoughts they could hardly speak that this was clear faith (Muslim 132), and he said that deeds are judged by intentions ( 1).5

Second, the jurists treated declaring a Muslim an unbeliever, takfir, as a grave matter to be approached with caution. The manuals show that caution in many places. In a related case, a non-Muslim who pronounced the testimony of faith and then said he had not meant to enter Islam, Ibn Qudama reports Ahmad’s view that a person’s statement is accepted where it may be true, “so his blood is not shed on a doubt”.6

Third, doubt is not on the list. Asking questions, reading criticism, struggling to pray, feeling far from God: none of these is apostasy in any school. The tradition has a long and honest literature on doubt, which our guide doubt and the inner life describes, and the companion site’s article on whether doubt is permitted in Islam sets out the case.

Who decides

In the classical law, apostasy is a matter for a court alone. The jurist applies the conditions; a family member, an imam or a stranger on the internet has no standing to declare anyone an apostate with legal effect. Ibn Qudama says plainly that if anyone other than the ruler kills an apostate he has done wrong and is to be punished for overstepping.7 Whatever one thinks of the classical penalty, which our guide the apostasy penalty discusses, the classical law never licensed private violence.

The jurists also required that the person be invited to return. The schools differed over how long, which the penalty guide sets out. The point here is that the law, as written, treated the matter as one requiring due process, conditions and time.

The consequences the jurists discussed

Besides the penal question, the manuals discuss civil consequences: what happens to a marriage, to property, to inheritance. Ibn Qudama records, for instance, a disagreement over whether the property of an apostate passes to heirs at once, as Abu Hanifa held, or is held in trust while the person may still return.8 These questions still matter, because in several modern states personal status law, not criminal law, is where apostasy has its effect. Our guide leaving and the law sets out where that is so.

Riddah in history

The word riddah is also the name of a historical event: the wars fought by the first caliph, Abu Bakr, against tribes that withdrew from the young Muslim polity after the Prophet’s death, some of them refusing to pay the alms tax and some following rival claimants to prophethood. Those wars were about political allegiance and armed secession as much as belief, and modern scholars who argue that the classical penalty concerned treason rather than private conscience often begin there. The companion site discusses this history in the political history of apostasy, and this site’s rebuttal apostasy and the classical law sets out the legal position in brief.

What the Qur’an itself says

The Qur’an speaks about turning away from faith several times and in serious terms. It warns that the deeds of one who dies in disbelief are lost (2:217). It speaks of those who believe and disbelieve repeatedly (4:137). It promises wrath to those who open their breasts to disbelief willingly (16:106). But no verse of the Qur’an prescribes a worldly penalty for apostasy. The penalties it describes are in the Hereafter, and alongside them stand verses on choice: “there is no compulsion in religion” (2:256), and “whoever wills, let him believe; and whoever wills, let him disbelieve” (18:29). How these verses relate to the on which the classical penalty rests is the heart of the modern debate.

The Qur’an also leaves the door open. The passage that begins by asking how God will guide a people who disbelieved after believing continues: “except for those who repent after that and correct themselves; indeed God is Forgiving and Merciful” (3:89). Our guide coming back is about that door.

If you are reading this about yourself

Please read this slowly. Nothing in the paragraphs above describes a person who is unsure. Doubt is not apostasy. Having questions is not apostasy. Reading this site is not apostasy. Even in the classical law, apostasy required an adult of sound mind, acting freely and knowingly, and a court. No one has the right to apply that law to you privately, and anyone who threatens you is doing something the classical jurists themselves condemned.

If you have decided you no longer believe, that is a serious matter for you, and it may carry real risks depending on where you live and who is around you. Those risks are real, and this site does not pretend otherwise. Read afraid of what happens if I leave, and if you are in any danger, look at where to find support. If you are in immediate danger, contact your local emergency number.

Whatever you have decided, you deserve accurate information rather than threats, and you deserve time. This guide has tried to give you the first. The second is yours to take.

Summary

  • Apostasy, riddah, is defined in classical law as turning back from Islam to disbelief.
  • It applies only to an adult of sound mind, acting freely and knowingly. Compulsion removes it entirely (16:106).
  • Thoughts, doubts and questions are not apostasy.
  • Only a court could apply the classical law, and private violence was condemned by the jurists themselves.
  • The Qur’an prescribes no worldly penalty for apostasy, and it keeps the door of return open (3:89).

Sources

  1. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: the definition of the apostate, and the conditions 'adult and of sound mind'. https://shamela.ws/book/8463/3917
  2. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: apostasy while intoxicated; the two narrations from Ahmad and the view of Abu Hanifa. https://shamela.ws/book/8463/3940
  3. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: a protected non-Muslim compelled to accept Islam; no legal effect, citing 2:256. https://shamela.ws/book/8463/3937
  4. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: most jurists did not declare the Kharijites unbelievers. https://shamela.ws/book/8463/3926
  5. Muslim 132, 'that is clear faith'; Sahih al-Bukhari 1, 'deeds are judged by intentions'. https://shamela.ws/book/1727/298
  6. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: Ahmad's view that a statement which may be true is accepted, 'so his blood is not shed on a doubt'. https://shamela.ws/book/8463/3936
  7. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: one who kills an apostate without the ruler has done wrong and is punished (ta'zir). https://shamela.ws/book/8463/3923
  8. Ibn Qudama, al-Mughni (Maktabat al-Qahira ed.), Kitab al-Murtadd: the apostate's property; Abu Hanifa's view that it passes to heirs. https://shamela.ws/book/8463/3925
  9. Qur'an 2:217; 2:256; 3:89; 4:137; 16:106; 18:29, checked against api.quran.com.
Apostasy Law