Sunan Abi Dawud — General Behavior (Kitab Al-Adab) — Hadith No: 5109

A’ishah said the Apostle of Allaah(ﷺ) visited her when a man was with her. The narrator Hafs said “this grieved him and he frowned”. The agreed version then goes, She said “He is my foster brother Apostle of Allaah(ﷺ)”. He said “Consider, who are you brethren, for fosterage is consequent on hunger.”

‘Abd Allaah bin Mas’ud said “Fosterage is not valid except by what strengthens love and grows flesh.” Abu Musa said “Do not ask us so long as this learned man is among us”

Ibn ‘Umar reported the Prophet (ﷺ) as saying “If a slave marries without the permission of his master, his marriage is null and void. Abu Dawud said “This tradition is weak. This is mauquf(does not go back to the Prophet). This is the statement of the Ibn ‘Umar himself

Narrated Samurah: The Prophet (ﷺ) said: Any woman who is married by two guardians (to two different men) belongs to the first woman who is married by two guardians (to two different men) belongs to the first of them and anything sold by a man to two persons belongs to the first of them