Numbers 20:5-9

Why did you make us come up from Egypt, to bring us into this wretched place? It is not a place of grain or figs or vines or pomegranates, nor is there water to drink!”

Then Moses and Aaron came in from the presence of the assembly to the entrance of the tent of meeting and fell on their faces. And the glory of the Lord appeared to them;

then the Lord spoke to Moses, saying, The Waters of Meribah

“Take the staff; and you and your brother Aaron assemble the congregation and speak to the rock before their eyes, that it shall yield its water. So you shall bring water for them out of the rock, and have the congregation and their livestock drink.”

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