Sayyiduna Umar (may Allah be pleased with him) asked Sayyiduna Ali (may Allah be pleased with him) for the hand of Umm Kulthum, and Ali (may Allah be pleased with him) said to him: She is too young for that. Umar (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) saying: "Every tie and lineage will be cut off on the Day of Resurrection, except my tie and my lineage," so I wished to have both a lineage and a tie with him (peace and blessings be upon him). Then Ali (may Allah be pleased with him) said to Hasan and Husayn (may Allah be pleased with them both): Marry her to your uncle. They said: She is a woman who chooses for herself. Ali (may Allah be pleased with him) stood up in anger, and Hasan (may Allah be pleased with him) took hold of his garment and said: O dear father, we cannot bear your parting from us. Then they married her to him (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13394