Narrated by Ubadah ibn as-Samit:

The Prophet صلى الله عليه وسلم said: “Whenever a Muslim supplicates Allah, Allah grants his supplication or averts some kind of evil from him so long as he does not supplicate for something sinful or something that would cut off the ties of kinship.” Thereupon someone said: “Then we shall supplicate plenty.” The Prophet صلى الله عليه وسلم said: “Allah is more plentiful in responding.”

Transmitted by Tirmidhi, Hakim’s version adds: “Or lays up a reward for him like it.”