374. Commandment – Forbidden to you are those relative women such as …..

[4:24] Forbidden to you are your mothers, and your daughters, and your sisters, and your fathers’ sisters, and your mothers’ sisters, and brother’s daughters, and sister’s daughters, and your foster-mothers that have given you suck, and your foster-sisters, and the mothers of your wives, and your stepdaughters, who are your wards by your wives unto whom you have gone in — but if you have not gone in unto them, there shall be no sin upon you — and the wives of your sons that are from your loins; and it is forbidden to you to have two sisters together in marriage, except what has already passed; surely, Allah is Most Forgiving, Merciful.