In Genesis 31:44, Laban proposes the covenant — here in 31:52 he specifies its non-aggression terms witnessed by the heap and pillar.

In Genesis 31:45, Jacob sets up the pillar that 31:52 designates as a permanent witness to their non-aggression pact.

In Genesis 31:48, Laban names the heap Galeed ('heap of witness') — the same witness 31:52 invokes for the covenant terms.

In Genesis 21:30, Abraham uses ewe lambs as a witness to a well agreement — same pattern of physical objects testifying to a pact.

In Joshua 22:27, the eastern tribes build an altar as a witness between parties — same covenant-witness pattern as the heap here.