The Targum Pseudo-Jonathan on Genesis 28:15 renders a line that changes how you read Jacob's exile. God does not merely promise Jacob that He will be with him. God says: My Word (Aramaic Memri) is for thy help.
The Memra — the Word — is the Targum's favorite way of describing the presence of God that enters the world without compromising God's transcendence. The Word keeps. The Word returns. The Word finishes what it began.
Listen to the promise as the Targum rephrases it: My Word is for thy help, and will keep thee in every place where thou shalt go, and will bring thee again to this land; for I will not leave thee until the time when I have performed all that I have told thee.
Three promises stitched together: presence, protection, return. Jacob will walk for twenty years through the house of a trickster father-in-law, Laban. He will raise twelve children under pressure. He will wrestle an angel by a river. And through all of it, the Word is not a backup plan. The Word is the companion who watches the road.
The phrase for I will not leave thee until is sometimes misread. It does not mean God will leave after the promise is fulfilled. It means God will not depart before. The covenant has no exit clause.
The takeaway: when a Jew undertakes a long journey for the sake of Heaven, the Word of God travels with them as a partner, not a signal. And that partner does not stop until the whole promise has been kept.