Surely Allah does not do injustice to the weight of an atom, and if it is a good deed He multiplies it and gives from Himself a great reward.

Whoever brings a good deed, he shall have ten like it, and whoever brings an evil deed, he shall be recompensed only with the like of it, and they shall not be dealt with unjustly.

And if every soul that has done injustice had all that is in the earth, it would offer it for ransom, and they will manifest regret when they see the chastisement and the matter shall be decided between them with justice and they shall not be dealt with unjustly.

This day every soul shall be rewarded for what it has earned; no injustice (shall be done) this day; surely Allah is quick in reckoning.

A good deed is a good deed.

How now, you secret, black, and midnight hags! What is't you do? A deed without a name