سورة Ash-Shura (Consultation ) - الآية 23

This is what Allah gives the glad tidings of to His bondmen who accept faith and do good deeds; say (O dear Prophet Mohammed – peace and blessings be upon him) “I do not ask any fee from you upon this, except the love between close ones”; and whoever performs a good deed – We further increase the goodness in it for him; indeed Allah is Oft Forgiving, Most Appreciative.