Jeremiah 32:38

And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee.

Thou hast avouched the LORD this day to be thy God, and to walk in his ways, and to keep his statutes, and his commandments, and his judgments, and to hearken unto his voice: And the LORD hath avouched thee this day to be his peculiar people, as he hath promised thee, and that thou shouldest keep all his commandments; And to make thee high above all nations which he hath made, in praise, and in name, and in honor; and that thou mayest be an holy people unto the LORD thy God, as he hath spoken.

Happy is that people, that is in such a case: yea, happy is that people, whose God is the LORD.

And I will give them an heart to know me, that I am the LORD: and they shall be my people, and I will be their God: for they shall return unto me with their whole heart.

And ye shall be my people, and I will be your God.

At the same time, saith the LORD, will I be the God of all the families of Israel, and they shall be my people.

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: