Sahih al-Bukhari Book 68, Hadith 37
(the wife of the Prophet) When believing women came to the Prophet (ﷺ) as emigrants, he used to test
them in accordance with the order of Allah. 'O you who believe! When believing women come to you
as emigrants, examine them . . .' (60.10) So if anyone of those believing women accepted the above
mentioned conditions, she accepted the conditions of faith. When they agreed on those conditions and
confessed that with their tongues, Allah's Messenger (ﷺ) would say to them, "Go, I have accepted your oath
of allegiance (for Islam). By Allah, and hand of Allah's Messenger (ﷺ) never touched the hand of any
woman, but he only used to take their pledge of allegiance orally. By Allah, Allah's Messenger (ﷺ) did not
take the pledge of allegiance of the women except in accordance with what Allah had ordered him.
When he accepted their pledge of allegiance he would say to them, "I have accepted your oath of
allegiance."
Qariba,
The daughter of Abi Umaiyya, was the wife of 'Umar bin Al-Khattab. 'Umar divorced her and then Mu'awiyya bin Abi Sufyan married her. Similarly, Um Al-Hakam, the daughter of Abi Sufyan was the wife of 'Iyad bin Ghanm Al-Fihri. He divorced her and then 'Abdullah bin 'Uthman Al-Thaqafi married her.
Allah's Messenger (ﷺ) took an oath that he would abstain from his wives, and at that time his leg had been sprained (dislocated). So he stayed in the Mashruba (an attic room) of his for 29 days. Then he came down, and they (the people) said, "O Allah's Messenger (ﷺ)! You took an oath to abstain from your wives for one month." He said, "The month is of twenty nine days."