Mukhtasar Bukhari

Narrated Ibn Abbas (may Allah be pleased with them) that the Messenger of Allah (peace and blessings of Allah be upon him) came out with his shoulders covered with a sheet and his head tied with a strip of smooth cloth, until he sat on the pulpit. He praised and glorified Allah, then said: "O people! Indeed, (other) people will become numerous and the Ansar will become fewer, until they remain like the amount of salt in food. So whoever among you attains such authority that he can benefit or harm, he should accept the good and virtue of the Ansar and overlook their faults."