The answer is: Hitting a rock twice

Num 20:11

Moses, a towering figure in the Hebrew scriptures, is remembered for many incredible feats, but he also faced severe consequences for a single lapse—misjudging a moment by striking a rock instead of speaking to it. This short-listed act happened when the Israelites were once again grumbling, thirsty in the desert. God had told Moses to command the rock to bring forth water, but in a moment of frustration, he struck the rock not just once, but twice (Numbers 20:11). Surprisingly, instead of just conveying the miracle through faith-filled words, he resorted to a display of physical power—and that small straying from divine instruction cost him dearly.

This incident offers rich lessons about leadership, accountability, and the expectations of faith. Despite his close relationship with God, this moment of anger closed the door to the Promised Land for Moses (Numbers 20:12). Interestingly, while Moses doesn't step foot into Canaan, it doesn't overshadow his legacy as a liberator; it emphasizes the profound responsibility that comes with leadership.

Moreover, did you know the rock that Moses struck is sometimes equated symbolically with Christ? In 1 Corinthians 10:4, it mentions a “spiritual rock” that followed the Israelites, suggesting a deeper connection between faith nutrients and divine provision. In this vein, Moses serves as both the exemplary leader and as a human reminding us that even the greatest can stumble. It underscores a vital aspect of the journey: the importance of whole-hearted alignment with divine instructions no matter how seasoned one might be.