But the king spared Mephibosheth, the son of Jonathan, the son of Saul, because of the oath of the Lord which was between them, between David and Saul’s son Jonathan.
If a man makes a vow to the Lord, or takes an oath to put himself under a binding obligation, he shall not break his word; he shall act in accordance with everything that comes out of his mouth.
unless, when we come into the land, you tie this cord of scarlet thread in the window through which you let us down, and gather into your house your father, your mother, your brothers, and all your father’s household.