Quran 4:23

حُرِّمَتۡ عَلَيۡڪُمۡ أُمَّهَـٰتُكُمۡ وَبَنَاتُكُمۡ وَأَخَوَٲتُڪُمۡ وَعَمَّـٰتُكُمۡ وَخَـٰلَـٰتُكُمۡ وَبَنَاتُ ٱلۡأَخِ وَبَنَاتُ ٱلۡأُخۡتِ وَأُمَّهَـٰتُڪُمُ ٱلَّـٰتِىٓ أَرۡضَعۡنَكُمۡ وَأَخَوَٲتُڪُم مِّنَ ٱلرَّضَـٰعَةِ وَأُمَّهَـٰتُ نِسَآٮِٕكُمۡ وَرَبَـٰٓٮِٕبُڪُمُ ٱلَّـٰتِى فِى حُجُورِڪُم مِّن نِّسَآٮِٕكُمُ ٱلَّـٰتِى دَخَلۡتُم بِهِنَّ فَإِن لَّمۡ تَكُونُواْ دَخَلۡتُم بِهِنَّ فَلَا جُنَاحَ عَلَيۡڪُمۡ وَحَلَـٰٓٮِٕلُ أَبۡنَآٮِٕڪُمُ ٱلَّذِينَ مِنۡ أَصۡلَـٰبِڪُمۡ وَأَن تَجۡمَعُواْ بَيۡنَ ٱلۡأُخۡتَيۡنِ إِلَّا مَا قَدۡ سَلَفَ‌ۗ إِنَّ ٱللَّهَ كَانَ غَفُورً۬ا رَّحِيمً۬ا ٢٣

Prohibited for you (in marriage) are your mothers, your daughters, your sisters, the sisters of your fathers, the sisters of your mothers, the daughters of your brother, the daughters of your sister, your nursing mothers, the girls who nursed from the same woman as you, the mothers of your wives, the daughters of your wives with whom you have consummated the marriage – if the marriage has not been consummated, you may marry the daughter. Also prohibited for you are the women who were married to your genetic sons. Also, you shall not be married to two sisters at the same time – but do not break up existing marriages. ALLAH is Forgiver, Most Merciful.