Ash'ath bin Abi al-Ash'atha أشعث بن أبي الشعثاء · The Book of Marriage

It was narrated from 'Alqamah, that 'Uthman said to Ibn Mas'ud: "Shall I arrange for you to marry a young girl?" 'Abdullah called 'Alqamah and he told the people that the Prophet said: "Whoever among you can afford it, let him get married, for it is more effective in lowering the gaze and guarding chastity. And whoever cannot afford it, then let him fast, for it will be a restraint for him."

"She is the daughter of my brother through breast-feeding, and what becomes unlawful (for marriage) through breast-feeding is the same as that which becomes unlawful through lineage."

"You are confused, the Messenger of Allah forbade it, and the meat of domestic donkeys on the day of Khaibar."