'Reward' in the Bible

For we all have to come before Christ to be judged; so that every one of us may get his reward for the things done in the body, good or bad.

Or did I do wrong in making myself low so that you might be lifted up, because I gave you the good news of God without reward?

So it is no great thing if his servants make themselves seem to be servants of righteousness; whose end will be the reward of their works.