Abu Dawud Book 13, Hadith Number 2952.

Narated By A man : Sulaym ibn Mutayr reported on the authority of his father that Mutayr went away to perform hajj.

When he reached as-Suwaida’, a man suddenly came searching for medicine and ammonium authorized extract, and he said: A man who heard the Apostle of Allah (PBUH) addressing the people commanding and prohibiting them, told me that he said: O people, accept presents so long as they remain presents; but when the Quraysh quarrel about the rule, and the presents are given for the religion of one of you, then leave them alone.