The answer is: Hitting a rock twice

Num 20:11

The incident of Moses striking the rock is both compelling and tragic, as it highlights a moment of human frailty in an otherwise great leader. You may recall that God instructed Moses to speak to the rock for water instead of using violence—his renowned action tool—of striking it. As recorded in Numbers 20:11, instead of following God’s directions, Moses struck the rock not once, but twice out of frustration with the complaining Israelites. This rash action eventually led to his punishment: he would be barred from entering the Promised Land.

One interesting bit of trivia connects this situation with a much larger narrative about faith and obedience throughout the Scriptures. Speaking rather than striking echoes God's broader theme throughout biblical literature—where mere words transformed creation itself (Genesis 1:3), and where Jesus emphasized prayerful communication with God instead of aggressive physical actions.

Moreover, Moses' initial duty to lead was often shadowed by what some might see as Israel's recurring doubts. It's a fascinating parallel found in Hebrews 4, which points out that while Moses served important roles within the struggle for liberation, there was something even greater promised—a rest or promise still awaiting.

Ultimately, Moses’ action reminds us that even profound leaders falter under pressure—and thus evince the human struggle between maintaining faith and yielding to frustration plays on our own journey towards fulfillment and transformation. This story gives rich lessons on trust, patience, and leadership!