Genesis 31:52
This heap be witness, and this pillar be witness, that I will not pass over this heap to thee, and that thou shalt not pass over this heap and this pillar unto me, for harm. This heap be witness, and this pillar be witness, that I will not pass over this heap to thee, and that thou shalt not pass over this heap and this pillar unto me, for harm.
The verse belongs to Jacob's departure from Laban after long service in which Laban's property had grown from little to a multitude and Jacob himself had increased exceedingly with cattle and servants. Laban confessed the Lord had blessed him for Jacob's sake and urged him to remain, but Laban became envious and his countenance was not toward Jacob as before while his sons accused Jacob of taking their father's wealth and glory. This left Jacob in perplexity and distress, fearing violence from Laban's sons as well as encountering Esau, so mindful of the Bethel promise he carried his case to God and was answered in a dream with the command to return to the land of his fathers and to his kindred with the assurance of divine presence with him.
The covenant was proposed on Laban's terms after he could not deny Jacob's charges of selfish and harsh treatment, and Jacob agreed to it. As part of the covenant, Jacob entered a solemn promise before the Lord not to take other wives besides Leah and Rachel. A pile of stones was raised as the token of the compact, with the heap and the pillar standing as witnesses and as a mutual boundary of peace that neither man was to pass over to harm the other. The stones served as a visible sign of the agreement and a solemn reminder that God witnesses it.
Laban named the pillar Mizpah, meaning watch-tower, calling on the Lord to watch between them when they were absent from one another. Laban called on the God of Abraham and of Nahor to judge between them, while Jacob swore by the Fear of his father Isaac. The treaty was confirmed by a feast and a night of friendly communing, and at dawn Laban departed, ending all trace of connection between the children of Abraham and the dwellers in Mesopotamia.