Numbers 20:6-9

6Then Moses and Aaron went from the presence of the assembly to the doorway of the Tent of Meeting (tabernacle) and fell on their faces [before the Lord in prayer]. Then the glory and brilliance of the Lord appeared to them;

7and the Lord spoke to Moses, saying,

8“Take the rod; and you and your brother Aaron assemble the congregation and speak to the rock in front of them, so that it will pour out its water. In this way you shall bring water for them out of the rock and let the congregation and their livestock drink [fresh water].”

9So Moses took the rod from before the Lord, just as He had commanded him;