The oil and the stone as signs of Christ's anointing, burial, and cornerstone
Eustathius is explaining the prophetic meaning of the details of Jacob's pillar at Bethel, now turning to the oil poured on it and the stone itself.
So he did not pour the oil on the top of the pillar without purpose. Rather, it pointed to what Mary was doing earnestly when she poured ointment upon the extremities, the feet of Christ. And that oil, in turn, happened to be a sign of the burial, as the Lord himself made clear openly. This stone images that cornerstone which the builders rejected, but which became the cornerstone (Psalm 118:22; LXX 117:22). The divine Scriptures reveal two nations and two peoples. Moses is a witness to this. In Genesis, when he narrates the life of Rebecca, he says that she went to inquire of the Lord about what she had conceived.