Sayyiduna Jundub (may Allah be pleased with him) narrates: Once the Prophet Muhammad (peace and blessings be upon him) became ill. He was not able to stand (for prayer) for one or two nights (i.e., he did not come out). Then a woman came to him and said, "O Muhammad (peace and blessings be upon him), I think your devil has left you." So regarding this, the following verse was revealed: "By the morning brightness, and by the night when it covers with darkness, your Lord has not forsaken you, nor has He detested you."