Also on the authority of Abū Dharr (may Allah be pleased with him):
Some of the companions of the Messenger of Allah (may the blessings and peace of Allah be upon him) said to the Prophet (may the blessings and peace of Allah be upon him): O Messenger of Allah, the affluent have made off with the rewards : they pray as we pray, they fast as we fast, and they give away in charity the superfluity of their wealth.
He said: Has not Allah made things for you to give away in charity? Truly every tasbīha is a charity, every takbīra is a charity, every tahmīda is a charity, and every tahlīla is a charity; to enjoin a good action is a charity, and in the sexual act of each of you there is a charity.
They said: O Messenger of Allah, when one of us fulfills his sexual desire will he have some reward for that? He said: Do you [not] think that were he to act upon it unlawfully he would be sinning? Likewise, if he has acted upon it lawfully he will have a reward.
It was related by Muslim.
