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8"Take the rod, and assemble the congregation, you and Aaron your brother, and tell the rock before their eyes to yield its water; so you shall bring water out of the rock for them; so you shall give drink to the congregation and their cattle." 9And Moses took the rod from before the LORD, as he commanded him.
10And Moses and Aaron gathered the assembly together before the rock, and he said to them, "Hear now, you rebels; shall we bring forth water for you out of this rock?" 11And Moses lifted up his hand and struck the rock with his rod twice; and water came forth abundantly, and the congregation drank, and their cattle.
Numbers 20:8-11 (RSV)