Numbers 20:8

20:8 “Take the staff and assemble the community, you and Aaron your brother, and then speak to the rock before their eyes. It will pour forth its water, and you will bring water out of the rock for them, and so you will give the community and their beasts water to drink.”

Numbers 20:10

20:10 Then Moses and Aaron gathered the community together in front of the rock, and he said to them, “Listen, you rebels, must we bring water out of this rock for you?”