Musnad Ahmad 2:119

'Abd al-Rahman narrated to us, from Sufyan, from Abu Ishaq, from 'Amr ibn Maymun, from 'Umar ibn al-Khattab, who said: The polytheists would not depart from Jam' (Muzdalifah) until the sun shone upon Thabir. The Prophet, peace and blessings of Allah be upon him, opposed them, and he departed before the sun rose.