Sunan At-Tirmidhi
Hadith #896
Amr bin Maimun narrated:""We were halted at Jama when Umar bin Al-Khattab said: 'The idolaters would not depart until the sun had risen and they would say: ""Let the sun shine on Thabir"" and indeed the Messenger of Allah contradicted them.' So Umar departed before the rising of the sun