Allah Almighty says: "Forbidden to you are your mothers, your daughters, your sisters, your paternal aunts, your maternal aunts, the daughters of your brother, the daughters of your sister, your mothers who nursed you, your sisters through nursing, the mothers of your wives, and your stepdaughters who are raised under your guardianship, born of your wives with whom you have had intercourse; but if you have not had intercourse with them, there is no sin upon you; and the wives of your sons who are from your own loins, and that you combine two sisters (in marriage), except what has already passed. Indeed, Allah is ever Forgiving, Most Merciful." [Surah al-Nisa: 23]
And Allah Almighty said: "And do not marry those women whom your fathers have married." [Surah al-Nisa: 22]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / Q13899