It was narrated that `Amr bin Maimoon said:
l heard `Umar bin al Khattab say: The people of Jahiliyyah used not to move on from Jam` until they saw the sun shining on (the mountain of) Thabeer, and they would say: Shine Thabeer, then we will move on swiftly. So the Messenger of Allah (ﷺ) moved on before the sun rose.