But the king spared Mephibosheth, the son of Saul’s son Jonathan, because of the oath of the Lord that was between them, between David and Jonathan son of Saul.
When a man makes a vow to the Lord or swears an oath to bind himself by a pledge, he shall not break his word; he shall do according to all that proceeds out of his mouth.
if we invade the land and you do not tie this crimson cord in the window through which you let us down and you do not gather into your house your father and mother, your brothers, and all your family.