Ya'qub bin Ibrahim bin Sa'd يعقوب بن إبراهيم بن سعد بن إبراهيم · The Book of Marriage

It was narrated that Jabir said: "I got married then I came to the Prophet and he said: 'Have you got married, O Jabir?' I said: 'Yes.' He said: 'To a virgin or to a previously married woman?' I said: 'To a previously married woman.' He said: 'Why not a virgin, so you could play with her and she could play with you?'"

"The Messenger of Allah used to teach his Companions to perform Istikharah in all matters, just as he used to teach them Surahs from the Qur'an. He said: 'If any one of you is deliberating about a decision he has to make, then let him pray two Rak'ahs of non-obligatory prayer, then say: Allahumma inni astakhiruka bi 'ilmika wa astaqdiruka bi qudratika wa as'aluka min fadlika, fa innaka taqdiru wa la aqdir, wa ta'lamu wa la a'lam, wa anta 'allam…

"The Messenger of Allah married me when I was seven years old, and he consummated the marriage with me when I was nine."

"Salim has reached the age of manhood, and understands what men understand. He enters upon us, and I think that Abu Hudhaifah is not happy about that." The Prophet said: "Breast-feed him, and you will become unlawful to him." So she breast-fed him, and the displeasure of Abu Hudhaifah disappeared. She came back to him and said: "I breast-fed him and the displeasure of Abu Hudhaifah has disappeared."

"Also (forbidden are) women already married, except those (slaves) whom your right hands possess," meaning, this is permissible for you once they have completed their 'Iddah.

"The Messenger of Allah forbade Ash-Shighar." (One of the narrators) 'Ubaidullah said: "Ash-Shighar means when a man gives his daughter in marriage on condition that (the other man) gives him his sister in marriage."