Sahih Muslim | Book 1 | Chapter 67

Narrated by Anas
It is narrated on the authority of Anas that verily the Messenger of Allah (may peace be upon him) observed: The Hour (Resurrection) would not come so long as Allah is supplicated in the world.

Narrated by Anas
It is narrated on the authority of Anas that the Messenger of Allah (may peace be upon him) said: The Hour (Resurrection) would not come upon anyone so long as he supplicates Allah.