Isaiah 59:21

As for Me, this is My covenant or league with them, says the Lord: My Spirit, Who is upon you [and Who writes the law of God inwardly on the heart], and My words which I have put in your mouth shall not depart out of your mouth, or out of the mouths of your [true, spiritual] children, or out of the mouths of your children''s children, says the Lord, from henceforth and forever.