Exodus 17:15

Exo. 17:15. "And Moses built an altar, and called the name of it Jehovah-Nissi " (i.e. The Lord my banner). Altars were types of Christ, and therefore were sometimes called by the name of God, as Jacob called the altar he built in Bethel, El Bethel, or the God of Bethel. The special reason of Moses's calling this altar, that he built on occasion of their victory over Amalek, the Lord my Banner, was that Christ in that battle was in a special type represented as the banner of his people, under which they fought against their enemies, to which they should look, and by which they should be conducted as an army were by their banner or ensign, viz. in Moses holding up the rod of God in his hand on the top of the hill, as verses 9-12. That rod was a type of Christ, as has been shown, No. 195. Moses, while the people were fighting with Amalek, held up this rod as the banner under which the people should fight: while Moses held up this rod, Israel prevailed, and when he let it down, Amalek prevailed.

This is agreeable to what God commanded when the children of Israel were bitten with fiery serpents. Numbers 21:8. "Make thee a fiery serpent, and set it upon a pole;" in the original it is, "set it for a banner," or "ensign," or "upon an ensign." In all likelihood, the brazen serpent was set up on one of the poles of the standards or ensigns of the camp, and probably on the standard of the tribe of Judah, which was a lion, and was a type of Christ, who is the lion of the tribe of Judah: so it is prophesied that Christ should stand for an ensign. Isaiah 11:10; Isaiah 11:12. "And in that day there shall be a root of Jesse, which shall stand for an ensign of the people; to it shall the Gentles seek - And he shall set up an ensign for the nations, and shall assemble the outcasts of Israel."