Romans 11:5-6, 25-27

In the same way then, there has also come to be at the present time a remnant according to God’s gracious choice. But if it is by grace, it is no longer on the basis of works, otherwise grace is no longer grace.

For I do not want you, brethren, to be uninformed of this mystery—so that you will not be wise in your own estimation—that a partial hardening has happened to Israel until the fullness of the Gentiles has come in; and so all Israel will be saved; just as it is written, “THE DELIVERER WILL COME FROM ZION, HE WILL REMOVE UNGODLINESS FROM JACOB.” “THIS IS MY COVENANT WITH THEM, WHEN I TAKE AWAY THEIR SINS.”