Genesis 31:50-52

50If you should mistreat (humiliate, oppress) my daughters, or if you should take other wives besides my daughters, although no one is with us [as a witness], see and remember, God is witness between you and me.”

51Laban said to Jacob, “Look at this mound [of stones] and look at this pillar which I have set up between you and me.

52This mound is a witness, and this pillar is a witness, that I will not pass by this mound to harm you, and that you will not pass by this mound and this pillar to harm me.