It is narrated from Hazrat Adi (may Allah be pleased with him) that when this verse was revealed: "During the nights of Ramadan, you may eat and drink until the white thread becomes distinct to you from the black thread," I took two threads, one black and one white, and placed them under a pillow. I kept looking at them, but the black thread did not become distinct from the white thread, nor the white from the black. When morning came, I went to the service of the Noble Prophet (peace and blessings be upon him) and related the whole incident. The Noble Prophet (peace and blessings be upon him) said, "Your pillow is very wide; what is meant is the light of day and the darkness of night."