Sahih Muslim | Book 30 | Hadith Number 5679

Narrated by Abu Musa
Abu Musa reported Allah's Messenger (may peace be upon him) as saying: When Allah, the Exalted and Glorious, intends to show mercy to an Umma from amongst His servants He calls back His Apostle to his eternal home and makes him a harbinger and recompense in the world to come; and when He intends to cause destruction to an Umma, He punishes it while its Apostle is alive and He destroys it as he (the Apostle) witnesses it and he cools his eyes by destruction as they had belied him and disobeyed his command.