The Women - 4:149
And if you reveal or conceal a good deed, or forgive an evil deed, Allah is Forgiving, Powerful.
If we reveal or conceal a good deed:
The Cow/2:271
How good it would be if you revealed your charity. But it is better if you hide them and give them to the needy, and that will cover some of your sins. Allah is aware of what you do.
The Women/4:85
Whoever mediates a good deed has a credit for himself. And whoever mediates evil, for him is a share of it. Allah controls everything.
The Table Spread/5:12
"Allah had taken a promise from the Children of Israel and We sent twelve leaders from among them. Allah said: "I am with you if you observe the prayer, pay the zakat, believe in My messengers and respect them, and lend to Allah a good debt. I will cover your sins and give you gardens in which rivers flow. So whoever of you disbelieves after that has gone astray from the right path."
The Cattle/6:160
Whoever brings good, he shall have ten times what he brought. And whoever brings evil, he shall be punished only with its equivalent, and they shall not be wronged.