[2]: 92 She married Umar ibn al-Khattab before 616,[2]: 92 and they had two sons, Zayd and Ubayd Allah.
[1]: 207 The whole family emigrated to Medina in 622,[3]: 218 although Umm Kulthum and Qurayba were still polytheists.
[3]: 510 [4] Soon after the Treaty of Hudaybiya in 628, Muhammad announced a revelation that Muslims were ordered to "hold not to the cords of disbelieving women."
She married Abu Jahm ibn Hudhayfa in Mecca "while they were both polytheists," i.e., before January 630.
"[5][6]: 192 [7][8] Whether before or after this, Umm Kulthum was also one of the wives of Safwan ibn Umayya, a member of the Juma clan[2]: 92 who was a leader in the Quraysh opposition to Muhammad.