Numbers 20:7-9

New Revised Standard Version Catholic Edition

⁷ The Lord spoke to Moses, saying: ⁸ Take the staff, and assemble the congregation, you and your brother Aaron, and command the rock before their eyes to yield its water. Thus you shall bring water out of the rock for them; thus you shall provide drink for the congregation and their livestock.

⁹ So Moses took the staff from before the Lord, as he had commanded him.