Sayyiduna ‘Adi bin Hatim (may Allah be pleased with him) narrated that when this verse was revealed:“until the white thread becomes distinct to you from the black thread”(Al-Baqarah 187), I took a black thread and a white thread and placed them under my pillow, and I kept looking at them during the night, but their colors did not become clear to me. When morning came, I went to the Messenger of Allah (peace and blessings be upon him) and mentioned this to him. He said,“It means the darkness of the night (false dawn) and the whiteness of the day (true dawn).”