Sahih Bukhari Volume 002, Book 026, Hadith Number 731.

Narated By Ibn Abbas.  : I proceeded along with the Prophet on the day of 'Arafat (9th Dhul-Hijja). The Prophet heard a great hue and cry and the beating of camels behind him. So he beckoned to the people with his lash, "O people! Be quiet. Hastening is not a sign of righteousness."

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