When Jesus first met with Simon Peter he said;
John 1: 42
42 And he brought him to Jesus. And when Jesus beheld him, he said, Thou art Simon the son of Jona: thou shalt be called Cephas, which is by interpretation, A stone.
The real meaning of this word “stone” has created a large misunderstanding and many arguments. We take from Dr. Scofield’s (August 19, 1843 – July 24, 1921 an American theologian) comments in his footnotes: “There is in the Greek, a play upon the words “Thou art Peter (Petros —– literally, “a little rock” or “pebble”) and upon this Rock (Petra) I will build my church. He does not promise to build His church upon Peter, but upon Himself, and Peter himself is careful to tell us” (1 Peter 2:4-9)
4 To whom coming, as unto a living stone, disallowed indeed of men, but chosen of God, and precious,
5 Ye also, as lively stones, are built up a spiritual house, an holy priesthood, to offer up spiritual sacrifices, acceptable to God by Jesus Christ.
6 Wherefore also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious: and he that believeth on him shall not be confounded.
7 Unto you therefore which believe he is precious: but unto them which be disobedient, the stone which the builders disallowed, the same is made the head of the corner,
8 And a stone of stumbling, and a rock of offence, even to them which stumble at the word, being disobedient: whereunto also they were appointed.
9 But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light;
Of course it is Jesus who is The Rock! AKA The Foundation!
The apostle Paul said;
For no one can lay any foundation other than the one we already have — Jesus Christ.
(1 Corinthians 3:11)