Sura al-Nisāʾ 4:23

حُرِّمَتْ عَلَيْكُمْ أُمَّهَٰتُكُمْ وَبَنَاتُكُمْ وَأَخَوَٰتُكُمْ وَعَمَّٰتُكُمْ وَخَٰلَٰتُكُمْ وَبَنَاتُ ٱلْأَخِ وَبَنَاتُ ٱلْأُخْتِ وَأُمَّهَٰتُكُمُ ٱلَّٰتِىٓ أَرْضَعْنَكُمْ وَأَخَوَٰتُكُم مِّنَ ٱلرَّضَٰعَةِ وَأُمَّهَٰتُ نِسَآئِكُمْ وَرَبَٰٓئِبُكُمُ ٱلَّٰتِى فِى حُجُورِكُم مِّن نِّسَآئِكُمُ ٱلَّٰتِى دَخَلْتُم بِهِنَّ فَإِن لَّمْ تَكُونُوا۟ دَخَلْتُم بِهِنَّ فَلَا جُنَاحَ عَلَيْكُمْ وَحَلَٰٓئِلُ أَبْنَآئِكُمُ ٱلَّذِينَ مِنْ أَصْلَٰبِكُمْ وَأَن تَجْمَعُوا۟ بَيْنَ ٱلْأُخْتَيْنِ إِلَّا مَا قَدْ سَلَفَ إِنَّ ٱللَّـهَ كَانَ غَفُورًا رَّحِيمًا

ḥurrimat ʿalaykum ummahātukum wa-banātukum wa-akhawātukum wa-ʿammātukum wa-khālātukum wa-banātu l-akhi wa-banātu l-ukhti wa-ummahātukumu allātī arḍaʿnakum wa-akhawātukum mina l-raḍāʿati wa-ummahātu nasāʾikum wa-rabāʾibukumu allātī fī ḥujūrikum min nisāʾikumu allātī dakhaltum bihinna fa-in lam takūnū dakhaltum bihinna fa-lā junāḥa ʿalaykum wa-ḥalāʾilu abnāʾikumu lladhīna min aṣlābikum wa-an tajmaʿū bayna l-ukhtayni illā mā qad salafa inna allāha kāna ghafūran raḥīman

Prohibited to you (For marriage) are:- Your mothers, daughters, sisters; father's sisters, Mother's sisters; brother's daughters, sister's daughters; foster-mothers (Who gave you suck), foster-sisters; your wives' mothers; your step-daughters under your guardianship, born of your wives to whom ye have gone in,- no prohibition if ye have not gone in;- (Those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for Allah is Oft-forgiving, Most Merciful;-