Genesis 17:7

And I Will Establish My Covenant between Me and you and your descendants after you throughout their generations, an Eternal Covenant, to be your G-d and the G-d of the descendants after you.

Leviticus 26:44-45

Thus, even while they are in the land of their enemies, I will not reject or obliterate them, lest I break My Covenant with them by destroying them, for I Am the Lord their G-d. I Will Remember for them the Covenant of the first ones, whom I Brought out of the land of egypt in the sight of the nations, to be G-d unto them--I Am Hashem.

Isaiah 54:10

Because the mountains will move and hills will be Shaken, but My Kindness shall never move from you, nor My Covenant of peace be shaken, Said G-d, the One Who Shows you Mercy.

Isaiah 54:17

No weapon fashioned against you shall prevail; and every tongue that launches an accusation against you, you shall prove false. This is the Heritage of the servants of G-d, their Vindication from Me, Says G-d.

Isaiah 59:21

As for Me, this is My Covenant with them, Says G-d. My Spirit, which Is upon you, and My Words that I have Placed in your mouth shall not depart from your mouth, nor from the mouths of your children, nor from the mouths of your children's children, Says G-d, from now and forever.

Jeremiah 5:18-19

But even in those days, Declares G-d, I will not destroy you completely. And when you shall ask, "Why did our G-d Do all these things to us?" you shall answer them, "Just as you abandoned Me and served strange gods in your Land, so too will you serve strangers in a land not your own."

Jeremiah 31:34-45

Thus Says G-d, Who Establishes the sun to light the day, the laws of the moon and stars to light the night, Who Stirs up the sea into roaring waves, Whose Name is the Lord of Hosts: "If these laws of nature would ever give way before Me," Says G-d, "only then shall the offspring of Israel cease to be a nation before Me for all time."

Jeremiah 46:27-28

But fear not O Jacob my servant, neither be dismayed, O Israel, because I Shall Redeem you from afar, and your children from the land of their captivity; and Jacob will again be quiet and at ease and none shall make him afraid. Fear not O Jacob My servant, Says G-d, for I Am With you. For I Will Topple all the nations to which I have driven you. But of you I will not make a full end. I Will Correct you in just measure, but I will not utterly destroy you.

Malachi 3:6

For I am G-d, I do not change; you are the children of Jacob, you will not cease to be.