'Rock' in the Bible

he is like to a man building a house, who did dig, and deepen, and laid a foundation upon the rock, and a flood having come, the stream broke forth on that house, and was not able to shake it, for it had been founded upon the rock.

'And other fell upon the rock, and having sprung up, it did wither, through not having moisture.

'And those upon the rock: They who, when they may hear, with joy do receive the word, and these have no root, who for a time believe, and in time of temptation fall away.