'Go in Peace' in the Bible

And Abner will say to David, I will arise and go and gather to my lord the king, all Israel, and they shall cut out with thee a covenant, and thou didst reign over all that thy soul shall desire. And David will send away Abner, and he will go in peace.

And Joab and all the army which was with him came, and they will announce to Joab, saying, Abner the son of Ner came to the king, and he will send him away, and he will go in peace.

And the king said unto him, Go in peace. So he arose, and went to Hebron.