Translation:

23. Prohibited to you (for marriage) are: your mother 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.

Notes (Tafseer)

531. This Table of Prohibited Degrees agrees in the main with what is usually accepted among all nations, except in minor details. It begins in the last verse (with father's widows or divorcees). The scheme is drawn up on the assumption that the person who proposes to marry is a man: if it is a woman, the same scheme will apply, mutatis mutandis: it will read: "your fathers, sons, brothers," etc.; or you can always read it from the husband's view of relationship, as there must always be a husband in a marriage.

532. "Mother" includes grandmother (through the father or mother), great grandmother, etc.; "daughter" includes grand-daughter (through son or daughter), greatgrand daughter, etc.; "sister," includes full-sister and half-sister. "Father's sister" includes grandfather's sister, etc., and "mother's sister" includes grandmother's sister, etc.

533. "Fosterage" or milk-relationships play an important part in Muslim Law, and count like blood-relationships: it would therefore seem that not only foster-mothers and foster-sisters, but foster-mother's sister, etc., all come within the prohibited degrees.

534. It is generally held that "under your guardianship" is a description, not a condition.

535. "Sons" includes grandsons.

536. The bar against two sisters in marriage together applies to aunt and niece together, but not to deceased wife's sister.