How do we know Christ is the rock mentioned in Exodus?

The identification of the rock as Christ is affirmed by the Apostle Paul in 1 Corinthians 10:4, where he draws a parallel between the spiritual provisions of Christ and the physical need met by the rock in the desert. This theological insight highlights how the events of the Old Testament are significant precursors to the redemptive work of Christ. The adequacy of this provision is emphasized, as the water that flowed from the rock offered physical refreshment, paralleling how Christ offers spiritual life and sustenance to all who believe in Him.