Moses, who was part of so many miracles in Egypt and the wilderness, was guilty of disobedience late in the game.

Numbers 20:6. Then Moses and Aaron went from the presence of the assembly to the entrance of the Tent of Meeting, and they fell upon their faces and the glory of the LORD* appeared to them. 7. And the LORD* spoke to Moses saying, 8. “Take the staff and gather the assembly together, you and Aaron your brother, and speak to the rock before their eyes and it will give forth its water and you will bring water out of the rock to them: so you will give the congregation and their beasts drink.” 9. Then Moses took the staff from before the LORD*, as He commanded him. 10. And Moses and Aaron gathered the congregation together before the rock and he said to them, “Listen now, you rebels! Must we fetch you water out of this rock?” 11. And Moses lifted up his hand and with his staff he struck the rock twice, and the water came out abundantly, and the congregation and also their beasts drank. 12. And the LORD* spoke to Moses and Aaron, “Because you did not believe Me, to sanctify Me in the eyes of the children of Israel, therefore you will not bring this congregation into the land which I have given them.” 13. This is the water of Meribah, because the children of Israel strove with the LORD*, and He was sanctified among them.