1 Corinthians 10:4

And did all drink the same spiritual drink. The water supernaturally supplied (Ex 17:6 Nu 20:11) called "spiritual", for the same reason.

That spiritual Rock that followed them. The waters at Rephidim (Ex 17:1-6) and Kadesh (Nu 20:1-12) gushed from a rock. The rock did not itself supply them, but the power behind, the "spiritual Rock", even Christ. The rock of Rephidim did not follow them, but the "spiritual Rock" did, and supplied their necessities whenever they were in need. As the rock of Rephidim became a fountain, so Christ is the fountain of living waters to the world.
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