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?”
Jewish Publication Society of America Version (JPS1917) - Exodus 17:7 >And the name of the place was called Massah, and Meribah, because of the striving of the children of Israel, and because they tried the LORD, saying: 'Is the LORD among us, or not?'