Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
Dawud :: Book 19 : Hadith 2952
Narrated 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 anthorhizum extract, and he said: A man who heard the Apostle of Allah (peace_be_upon_him) 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.