Sayyiduna ‘Adi bin Hatim (may Allah be pleased with him) narrates that when this verse « وَكُلُواوَاشْرَبُواحَتَّىٰيَتَبَيَّنَلَكُمُالْخَيْطُالْأَبْيَضُمِنَالْخَيْطِالْأَسْوَدِ »[ سورة البقرة : 187 ] “And eat and drink until the white thread of dawn becomes distinct to you from the black thread,” was revealed, the Messenger of Allah (peace and blessings be upon him) said: “Indeed, it is the distinction of the whiteness of the day from the darkness of the night.”