Numbers 20:6-8

⁶And Moses and Aaron went from the presence of the assembly unto the door of the tent of meeting, and fell upon their faces; and the glory of the LORD appeared unto them.

⁷And the LORD spoke unto Moses, saying:

⁸'Take the rod, and assemble the congregation, thou, and Aaron thy brother, and speak ye unto the rock before their eyes, that it give forth its water; and thou shalt bring forth to them water out of the rock; so thou shalt give the congregation and their cattle drink.'