Moses named the place Massah -- "the place of testing" -- and Meribah -- "the place of arguing" -- because the people of Israel argued with Moses and tested the LORD by saying, "Is the LORD going to take care of us or not?"
Scripture quotations marked NLT are taken from the Holy Bible, New Living Translation, copyright 1996. Used by permission of Tyndale House Publishers, Inc., Wheaton, Illinois 60189. All rights reserved. (New Living Translation - The Bible Online)