Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 835

Narrated Muawiya:

I heard the Prophet saying, "A group of people amongst my followers will remain obedient to Allah's orders and they will not be harmed by anyone who will not help them or who will oppose them, till Allah's Order (the Last Day) comes upon them while they are still on the right path."