Let us make a covenant, I and thou. Laban here acts as men conscious of guilt are wont to do, when they wish to guard themselves against revenge: and this kind of trepidation and anxiety is the just reward of evil deeds. Besides, wicked men always judge of others from their own disposition: whence it happens that they have fears on all sides. Moses before relates a somewhat similar example, when Abimelech made a covenant with Isaac. Wherefore we must take the greater care, if we desire to possess tranquil minds, that we act sincerely and without injury towards our neighbors. Meanwhile Moses shows how placable Jacob was, and how easily he permitted himself to be conciliated. He had endured very many and grievous wrongs; but now, forgetting all, he freely stretches out the hand of kindness: and so far is he from being pertinacious in defending his own right, that he, in a manner, anticipates Laban himself, being the first to take a stone, and set it up for a pillar. And truly it becomes the children of God, not only with alacrity to embrace peace, but even ardently to search for it, as we are commanded in Psalm 34:14 As to the heap of stones, it was always the practice to use some ceremony which might confirm the compact on both sides; on this occasion a heap of stones is raised, in order that the memory of the covenant might be transmitted to posterity. That Jacob took part in this was a proof, as we have said, of a mind disposed to peace. He freely complained, indeed, when it was right to do so; but when the season of pacification arrived, he showed that he cherished no rancour. Moses, in relating afterwards that they did eat there, upon the heap, does not observe the order of the history. For, on both sides, the conditions of the covenant were agreed upon and declared, before the feast was celebrated: but this figure of speech (as we have before seen) was sufficiently in use.

Now therefore (i) come thou, let us make a covenant, I and thou; and let it be for a witness between me and thee.
(i) His conscience reproved him for his misbehaviour toward Jacob, and therefore moved him to seek peace.

Now therefore, come thou, let us make a covenant, I and thou,.... Let us be good friends, and enter into an alliance for mutual safety, and make an agreement for each other's good. Laban perceiving that Jacob's God was with him, and blessed him, and made him prosperous, and protected him, was fearful, lest, growing powerful, he should some time or other revenge himself on him or his, for his ill usage of him; and therefore was desirous of entering into a covenant of friendship with him:
and let it be for a witness between me and thee; that all past differences are made up, and former quarrels subside, and everything before amiss is forgiven and forgotten, and that for the future peace and good will subsist; of which a covenant made between them would be a testimony.

Come thou, let us make a covenant--The way in which this covenant was ratified was by a heap of stones being laid in a circular pile, to serve as seats, and in the center of this circle a large one was set up perpendicularly for an altar. It is probable that a sacrifice was first offered, and then that the feast of reconciliation was partaken of by both parties seated on the stones around it. To this day heaps of stones, which have been used as memorials, are found abundantly in the region where this transaction took place.

Let us make a covenant - It was made and ratified with great solemnity, according to the usages of those times. A pillar was erected, and a heap of stones raised, to perpetuate the memory of the thing, writing being then not known. A sacrifice was offered, a sacrifice of peace - offerings. They did eat bread together, jointly partaking of the feast upon the sacrifice. This was in token of a hearty reconciliation. Covenants of friendship were anciently ratified by the parties eating and drinking together. They solemnity appealed to God concerning their sincerity herein; As a witness, Genesis 31:49. The Lord watch between me and thee - That is, the Lord take cognizance of every thing that shall be done on either side in violation of this league. As a judge, The God of Abraham, from whom Jacob was descended, and The God of Nahor, from whom Laban was descended, the God of their father, the common ancestor from whom they were both descended, judge betwixt us. God's relation to them is thus expressed, to intimate that they worshipped one and the same God, upon which consideration there ought to be no enmity betwixt them. Those that have one God should have one heart: God is judge between contending parties, and he will judge righteously, whoever doth wrong it is at their peril. They gave a new name to the place, Genesis 31:47-48. Laban called it in Syriac, and Jacob in Hebrew, The heap of witness. And Genesis 31:49, it was called Mizpah, a watch - tower. Posterity being included in the league, care was taken that thus the memory of it should be preserved. The name Jacob gave this heap stuck by it, Galeed, not the name Laban gave it.