[1] Ali wanted his daughters to marry his brother Ja'far's sons, but Umm Kulthum's hand in marriage was requested by the Caliph, who promised, "No man on the face of the earth will treat her better than I will.
When Umm Kulthum brought this message to Umar, she reported, "He did not undo the garment nor look at anything except at me."
[2]: 299–300 Umar gave his bride a dowry of 40,000 dirhams,[3] and the marriage was consummated in November or December 638 (Dhu'l-Qaada 17 AH).
[2]: 299, 300 [1] Ruqayya later married Ibrahim, a son of Sa'd ibn Abi Waqqas, by whom she had a daughter.
[6] Nevertheless, it was said that Umar treated Umm Kulthum "with extreme honour and respect" because she was Muhammad's granddaughter.