Numbers 20:7-10

⁷And the Lord spoke to Moses, saying:

⁸Take the rod, and assemble the people together, thou and Aaron thy brother, and speak to the rock before them, and it shall yield waters. And when thou hast brought forth water out of the rock, all the multitude and their cattle shall drink.

⁹Moses therefore took the rod, which was before the Lord, as he had commanded him,

¹⁰And having gathered together the multitude before the rock, he said to them: Hear, ye rebellious and incredulous: Can we bring you forth water out of this rock?