Numbers 20:7-11

7And Jehovah spoke to Moses, saying,

8Take the staff, and gather the assembly together, thou, and Aaron thy brother, and speak ye unto the rock before their eyes, and it shall give its water; and thou shalt bring forth to them water out of the rock, and shalt give the assembly and their beasts drink.

9And Moses took the staff from before Jehovah, as he had commanded him.

10And Moses and Aaron gathered the congregation together before the rock, and he said to them, Hear now, ye rebels: shall we bring forth to you water out of this rock?

11And Moses lifted up his hand, and with his staff smote the rock twice, and much water came out, and the assembly drank, and their beasts.