Musannaf Ibn Abi Shaybah 19494 — Those who said her waiting period

Sayyiduna Ibn Umar (may Allah be pleased with them both) said: Sayyidah al-Rubayyi' (may Allah be pleased with her) obtained khul' from her husband. Her paternal uncle came to Sayyiduna Uthman (may Allah be pleased with him), and Sayyiduna Uthman (may Allah be pleased with him) said: She is to observe a waiting period of one menstrual cycle. Before this, Sayyiduna Ibn Umar (may Allah be pleased with them both) held that the waiting period of a woman who has obtained khul' is three menstrual cycles, but after this ruling of Sayyiduna Uthman (may Allah be pleased with him) he came to hold that it is one menstrual cycle, and he used to say: He was the best of us and the most knowledgeable of us.