Exodus 17:7-9

Revised Geneva Translation

⁷ And he called the name of the place, “Massah” and “Meribah”, because of the contention of the children of Israel and because they had tempted the LORD, saying, “Is the LORD among us or not?”

⁸ Then, Amalek came and fought with Israel in Rephidim.

⁹ And Moses said to Joshua, “Pick out men for us, and go fight with Amalek. Tomorrow, I will stand on the top of the hill with the rod of God in my hand.”