Exodus 17:1-6

Then all the congregation of the sons of Israel journeyed by stages from the wilderness of Sin, according to the command of the LORD, and camped at Rephidim, and there was no water for the people to drink. Therefore the people quarreled with Moses and said, “Give us water that we may drink.” And Moses said to them, “Why do you quarrel with me? Why do you test the LORD?” But the people thirsted there for water; and they grumbled against Moses and said, “Why, now, have you brought us up from Egypt, to kill us and our children and our livestock with thirst?” So Moses cried out to the LORD, saying, “What shall I do to this people? A little more and they will stone me.” Then the LORD said to Moses, “Pass before the people and take with you some of the elders of Israel; and take in your hand your staff with which you struck the Nile, and go. Behold, I will stand before you there on the rock at Horeb; and you shall strike the rock, and water will come out of it, that the people may drink.” And Moses did so in the sight of the elders of Israel.