'Heart of Flesh' in the Bible

And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh, and will give them an heart of flesh:

A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.

being manifest that ye are the epistle of Christ, through our ministration, written not with ink, but by the Spirit of the living God; not on tables of stone, but on tables of the heart of flesh.