'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 evil-doer according to his wickedness.

when one told me, saying, Behold, Saul is dead, thinking to have brought good tidings, I took hold of him, and slew him in Ziklag, which was the reward I gave him for his tidings.

Then said Ahimaaz the son of Zadok yet again to Joab, But come what may, let me, I pray thee, also run after the Cushite. And Joab said, Wherefore wilt thou run, my son, seeing that thou wilt have no reward for the tidings?

Thy servant would but just go over the Jordan with the king: and why should the king recompense it me with such a reward?