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2 Samuel 22
1 And David spake unto the LORD the words of this song in the day that the LORD had delivered him out of the hand of all his enemies, and out of the hand of Saul:
2 And he said, The LORD is my rock, and my fortress, and my deliverer;
3 The God of my rock; in him will I trust: he is my shield, and the horn of my salvation, my high tower, and my refuge, my saviour; thou savest me from violence.

There is only one Rock....and that Rock is Jesus Christ ! The cornerstone that the builders rejected!

The Rock that we meet first in the desert, from which living waters flow. The Rock that the Lord described to the woman at the well, the first Samarian Christian! And here's one for you: Moses didn't get to go into the promised land, not just for killing the Egyptian. More serious was that he lost his temper and struck the rock! (From a Jewish commentary)