When Hafsa, `Umar's daughter became a widow because of the death of her (husband) Ibn Hudhafa As-Sahmi who was one of the companion of the Prophet (ﷺ) and the one of the Badr warriors and died at Medina, `Umar said, "I met `Uthman bin `Affan and gave him an offer, saying, 'If you wish, I will marry Hafsa to you.' He said. 'I will think it over' I waited for a few days, then he met me and said, 'I have made up my mind not to marry at present' "`Umar added, "Then I met Abu Bakr and said to him, 'If you wish, I will marry Hafsa to you.' "
Sahih al-Bukhari Book 67, Hadith 65
← Previous Hadith (as regards the Verse): 'And about what is recited unto you in the Book, concerning orphan girls to whom you give not the prescribed portions and yet, whom you desire to marry.' (4.127) This Verse is about the female orphan who is under the guardianship of a man with whom she shares her property and he has more right over her (than anybody else) but does not like to marry her, so he prevents her, from marrying somebody else, lest he should share the property with him.

Sahih al-Bukhari Book 67, Hadith 64 Next Hadith → concerning the Verse: 'Do not prevent them' (2.232) Ma'qil bin Yasar told me that it was revealed in his connection. He said, "I married my sister to a man and he divorced her, and when her days of 'Idda (three menstrual periods) were over, the man came again and asked for her hand, but I said to him, 'I married her to you and made her your bed (your wife) and favored you with her, but you divorced her. Now you come to ask for her hand again? No, by Allah, she will never go back to you (again)!' That man was not a bad man and his wife wanted to go back to him. So Allah revealed this Verse: 'Do not prevent them.' (2.232) So I said, 'Now I will do it (let her go back to him), O Allah's Messenger (ﷺ)."So he married her to him again.

Sahih al-Bukhari Book 67, Hadith 66