Genesis 31:49-53

49and Mizpah, for he said, "The Lord watch between you and me, when we are out of one another's sight.

50If you oppress my daughters, or if you take wives besides my daughters, although no one is with us, see, God is witness between you and me."

51Then Laban said to Jacob, "See this heap and the pillar, which I have set between you and me.

52This heap is a witness, and the pillar is a witness, that I will not pass over this heap to you, and you will not pass over this heap and this pillar to me, to do harm.

53The God of Abraham and the God of Nahor, the God of their father, judge between us." So Jacob swore by the Fear of his father Isaac,