The Messenger of Allah صلى الله عليه وسلم said: “Any Muslim who makes a supplication containing nothing that is sinful and nothing that involves breaking ties of blood relationships, will be given for it by Allah one of these three things: He may accept his request, or save its reward for him in the next world, or turn away from him an equivalent amount of evil.” Those who heard it said, “We would, then, make many supplications.” The Prophet صلى الله عليه وسلم replied, “Allah is more than ready to answer what you ask.”

Reported by Ahmad and al-Bukhari in al-Adab al-Mufrad.