'Stone' in the Bible

For you are clearly a letter of Christ, the fruit of our work, recorded not with ink, but with the Spirit of the living God; not in stone, but in hearts of flesh.

For if the operation of the law, giving death, recorded in letters on stone, came with glory, so that the eyes of the children of Israel had to be turned away from the face of Moses because of its glory, a glory which was only for a time: