Take A Bath & Don't Hit That Rock! A Study of Numbers 19-20.

Numbers 19:21-22 It shall be a perpetual statute for them. He who sprinkles the water of purification shall wash his clothes; and he who touches the water of purification shall be unclean until evening. Whatever the unclean person touches shall be unclean; and the person who touches it shall be unclean until evening.’” 

Numbers 20:7-12 Then the Lord spoke to Moses, saying, “Take the rod; you and your brother Aaron gather the congregation together. Speak to the rock before their eyes, and it will yield its water; thus you shall bring water for them out of the rock, and give drink to the congregation and their animals.” So Moses took the rod from before the Lord as He commanded him. And Moses and Aaron gathered the assembly together before the rock; and he said to them, “Hear now, you rebels! Must we bring water for you out of this rock?” Then Moses lifted his hand and struck the rock twice with his rod; and water came out abundantly, and the congregation and their animals drank. Then the Lord spoke to Moses and Aaron, “Because you did not believe Me, to hallow Me in the eyes of the children of Israel, therefore you shall not bring this assembly into the land which I have given them.”