Genesis 35:14

And Jacob set up a pillar in the place where He talked with him, even a pillar of stone; and he poured a drink-offering thereon, and he poured oil thereon. Jacob not only set this place apart, consecrated it for the worship of the true God, but he also performed an act of worship by pouring out a libation to the Lord, this being the first instance in which the drink-offering is mentioned in the Bible. To commemorate this vision, to keep it in remembrance among his children, Jacob erected a stone for a monument.