Parallel
Deuteronomy 33:5
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
And he was king in Jeshurun, when the heads of the people and the tribes of Israel were gathered together.
So the LORD became King in Jeshurun (note: Jeshurun means the upright one, a term of endearment for Israel; also in verse 26.) when the leaders of the people gathered, when the tribes of Israel came together.