Ezekiel 36:26 (BSB)

I will give you a new heart and put a new spirit within you; I will remove your heart of stone and give you a heart of flesh.

From Ezekiel 36. Also in the ESV.

Commentary on Ezekiel 36:26

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Ezekiel 36:25-38: The people of God might be discouraged in their hopes of a restoration by the sense not only of their unworthiness of such a favour (which was answered, in the foregoing verses, with this, that God, in doing it, would have an eye to his own glory, not to their worthiness), but of their unfitness for such a favour, being still corrupt and sinful; and...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Ezekiel 36:26: A new heart also will I give you, and a new spirit will I put within you,.... A "new heart" and a "new spirit" are one and the same; that is, a renewed one; renewed by the Spirit and grace of God; in which a new principle of life is put; new light is infused; a new will, filled with new purposes and resolutions; where...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Ezekiel 36:26: new heart--mind and will. spirit--motive and principle of action. stony heart--unimpressible in serious things; like the "stony ground" (Mat 13:5, Mat 13:20), unfit for receiving the good seed so as to bring forth fruit. heart of flesh--not "carnal" in opposition to "spiritual"; but impressible and docile, fit for receiving the good seed.
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on Ezekiel 36:26: A new heart also will I give you - I will change the whole of your infected nature; and give you new appetites, new passions; or, at least, the old ones purified and refined. The heart is generally understood to mean all the affections and passions.