It is narrated from Hazrat Anas (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) went to the house of Hazrat Zaid bin Harithah (may Allah be pleased with him), and there he only saw his wife, Hazrat Zainab (may Allah be pleased with her). After a short while, Hazrat Zaid (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) with a complaint about his wife. The Prophet (peace and blessings be upon him) said to him, "Keep your wife with you and fear Allah." Upon this, the following verse was revealed: "And fear Allah and you conceal within yourself..."