Genesis 31:44-46

So come now, let us make a covenant, you and I, and let it serve as a witness between you and me.” So Jacob took a stone and set it up as a [memorial] pillar. Jacob said to his relatives, “Gather stones.” And they took stones and made a mound [of stones], and they ate [a ceremonial meal together] there on the mound [of stones]. [Prov 16:7]