Numbers 20:9-11

So Moses did as he was told. He took the staff from the place where it was kept before the LORD. Then he and Aaron summoned the people to come and gather at the rock. “Listen, you rebels!” he shouted. “Must we bring you water from this rock?” Then Moses raised his hand and struck the rock twice with the staff, and water gushed out. So the entire community and their livestock drank their fill.