Exodus 17:1-2

Then all the congregation of the children of Israel set out on their journey from the Wilderness of Sin, according to the commandment of the LORD, and camped in Rephidim; but there was no water for the people to drink. Therefore the people contended with Moses, and said, “Give us water, that we may drink.” So Moses said to them, “Why do you contend with me? Why do you tempt the LORD?”