Genesis 31:51-53

EasyEnglish Bible

⁵¹ Laban also said, ‘I have put this special stone here, and the heap of stones near it. They stand there between your land and my land. ⁵² I will not go past the stones to your side to hurt you. And you must not go past them to my side to hurt me. ⁵³ Let the God of Abraham, Nahor, and their ancestors decide if one of us is guilty.’

So Jacob made a promise in the name of the God that his father Isaac worshipped.