What did Moses name the place where Israel quarreled and tested the LORD over water?

Answer: Massah and Meribah

He named it Massah and Meribah because Israel quarreled and tested the LORD, asking, "Is the LORD among us or not?"

“He named the place Massah and Meribah because the Israelites quarreled, and because they tested the LORD, saying, “Is the LORD among us or not?””— Exodus 17:7 (BSB)