It is narrated from Hazrat Zainab bint Ka'b bin Ujrah that Sayyida Fari'ah bint Malik bin Sinan (may Allah be pleased with her), who is the sister of Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), came to the Messenger of Allah (peace and blessings be upon him) and asked, "May I have permission to go to my people? Because some slaves of my husband had run away, he went out to search for them. When he reached Qudum (a place seven miles from Madinah), he found the slaves there, and the slaves killed my husband. My husband has not left for me any personal house nor any maintenance. If you permit, I will go to my family." The Prophet (peace and blessings be upon him) said, "Go." When I turned to leave, I had not yet reached outside the chamber when the Prophet (peace and blessings be upon him) called me back, or someone else called me at his command, and asked me. I narrated the whole incident. The Prophet (peace and blessings be upon him) said, "Stay in this house until your waiting period ('iddah) is complete." So I observed my 'iddah in that house for four months and ten days. When Sayyiduna Uthman (may Allah be pleased with him) became the Caliph, he sent someone to ask me about this matter, and he gave a ruling in accordance with it.