It is narrated from Sayyidah Furay'ah bint Malik (may Allah be pleased with her) that her husband went out in search of a slave of his and was killed at Taraf al-Qadum. So she came to the Prophet (peace and blessings be upon him) and asked permission to move to her own family, and he (peace and blessings be upon him) gave permission; but when she turned to leave, he (peace and blessings be upon him) called out to her and said: "Remain in your house until the waiting period ('iddah) is completed."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21445