Muhammad bin Yahya bin Ayoub محمد بن يحيى أبو يحيى القصري المروزي · The Book of Marriage

"The Messenger of Allah established the bond of brotherhood between (some of) the Quraish and (some of) the Ansar, and he established the bond of brotherhood between Sa'd bin Ar-Rabi' and 'Abdur-Rahman bin 'Awf. Sa'd said to him: 'I have wealth, which I will share equally between you and me. And I have two wives, so look and see which one you like better, and I will divorce her, and when her 'Iddah is over you can marry her.' He…