'Go in Peace' in the Bible

Eli answered, and said, "Go in peace, the God of Israel shall grant thee thy petition that thou hast asked of him."

And in like manner, if evil to thee ward please my father, I will show thee and send thee away, that thou mayest go in peace. And the LORD be with thee as he hath been with my father.

And so David received of her hand that she brought him, and said to her, "Go in peace to thine house. And see, I have obeyed thy voice and have received thee to grace."

wherefore return and go in peace, that thou displease not the lords of the Philistines."