The widow observing her waiting period in her husband's house

It is narrated from Sayyidah Furay'ah bint Malik (may Allah be pleased with her) that her husband went out in search of some of his runaway slaves and was killed at a place called al-Qadum. She relates: I came to the Prophet (peace and blessings be upon him), explained my situation and asked permission to move to my brothers' home. He (peace and blessings be upon him) at first gave me permission, but when I turned to leave he called me and said: "Stay in your (husband's) house until the prescribed waiting period is completed."

It is narrated from Sayyidah Furay'ah bint Malik (may Allah be pleased with her), the sister of Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him), that she said: My husband went out in search of some of his runaway slaves and caught up with them at the edge of al-Qadum, and those slaves killed him. The news of his death reached me while I was living in a house far from the houses of my family. I came to the Messenger of Allah (peace and blessings be upon him) and said: The news of my husband's death has reached me while I am in a house far from the houses of my family; my husband has left me neither maintenance nor wealth, and this dwelling is not my own. If I moved to my brothers and my family, it would be easier for me in some of my affairs. He (peace and blessings be upon him) said: "Move." Then, when I reached the mosque or the (blessed) chamber, he (peace and blessings be upon him) called me (or ordered that I be called) and said: "Stay in the house in which the news of your husband's death reached you, until the prescribed term (the waiting period) is completed." So I spent the waiting period of four months and ten days there. She relates: Then Sayyiduna Uthman bin Affan (may Allah be pleased with him) (during his caliphate) sent for me; I narrated this hadith to him, and he acted upon it.
This hadith is sahih through both chains, but the two Shaykhs did not record it. Imam Malik bin Anas narrated it in the Muwatta from Sa'd bin Ishaq. Imam Muhammad bin Yahya al-Dhuhli said: This hadith is sahih and mahfuz (well-preserved). Sa'd bin Ishaq and Ishaq bin Sa'd are two separate narrators, of whom Sa'd is the better known, and Yahya bin Sa'id al-Ansari narrated from both of them, which removes the charge of being unknown (jahalah) from both.