Genesis 31:52

49 And Mizpah, for he said, May the Lord keep watch on us when we are unable to see one another's doings.

50 If you are cruel to my daughters, or if you take other wives in addition to my daughters, then though no man is there to see, God will be the witness between us.

51 And Laban said, See these stones and this pillar which I have put between you and me;

52 They will be witness that I will not go over these stones to you, and you will not go over these stones or this pillar to me, for any evil purpose.

53 May the God of Abraham and the God of Nahor, the God of their father, be our judge. Then Jacob took an oath by the Fear of his father Isaac.

54 And Jacob made an offering on the mountain, and gave orders to his people to take food: so they had a meal and took their rest that night on the mountain.

55 And early in the morning Laban, after kissing and blessing his daughters, went on his way back to his country.