'Reward' in the Bible

And I am this day weak, though anointed king; and these men, the sons of Zeruiah, are too hard for me: Jehovah reward the doer of evil according to his wickedness!

when one told me, saying, Behold, Saul is dead! and he was in his own sight a messenger of good, I took hold of him, and slew him in Ziklag to whom forsooth I should give a reward for his good tidings:

Thy servant will go a little way over the Jordan with the king; and why should the king recompense it to me with this reward?