'Reward' in the Bible

"Did all of you see this man coming up?" one Israeli asked. "He comes up to defy Israel, and the king will richly reward the man who kills him. He will give his daughter to him and will make his father's house tax free in Israel."

For if a man find his enemy, will he let him go well away? wherefore the LORD reward thee good for that thou hast done unto me this day.

And David, hearing that Nabal was dead, said, May the Lord be praised, who has taken up my cause against Nabal for the shame which he put on me, and has kept back his servant from evil, and has sent on Nabal's head the reward of his evil-doing. And David sent word to Abigail, desiring to take her as his wife.

And the Lord will give to every man the reward of his righteousness and his faith: because the Lord gave you into my hands today, and I would not put out my hand against the man who has been marked with the holy oil.