'Reward' in the Bible

While I, though I am crowned king, have little strength, and these men, the sons of Zeruiah, are out of my control: may the Lord give to the evil-doer the reward of his evil-doing!

When one came to me with the news of Saul's death, in the belief that it would be good news, I took him and put him to death in Ziklag, which was the reward I gave him for his news:

Then Ahimaaz, the son of Zadok, said to Joab again, Whatever may come of it, let me go after the Cushite. And Joab said, Why have you a desire to go, my son, seeing that you will get no reward for your news?

Your servant's desire was only to take the king over Jordan; why is the king to give me such a reward?

The Lord gives me the reward of my righteousness, because my hands are clean before him.

Because of this the Lord has given me the reward of my righteousness, because my hands are clean in his eyes.