An-Nisâ’ 4:22
وَلَا تَنكِحُوا مَا نَكَحَ آبَاؤُكُم مِّنَ النِّسَاءِ إِلَّا مَا قَدْ سَلَفَ ۚ إِنَّهُ كَانَ فَاحِشَةً وَمَقْتًا وَسَاءَ سَبِيلًا ٢٢
Wala tankihoo ma nakaha abaokum mina alnnisai illa ma qad salafa innahu kana fahishatan wamaqtan wasaa sabeelan
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And do not marry women whom your fathers and forefathers married. But that which has passed (before this command is forgiven). It is indeed highly indecent, infuriating and an evil custom. (4:22)