Disobedience to God: when he Struck the Rock
Source: Nav
Numbers 20:11, 23, 24
Then Moses raised his hand and struck the rock twice with his staff, so that a great amount of water gushed out, and the congregation and their livestock were able to drink. / And at Mount Hor, near the border of the land of Edom, the LORD said to Moses and Aaron, / “Aaron will be gathered to his people; he will not enter the land that I have given the Israelites, because both of you rebelled against My command at the waters of Meribah.