'Everlasting Possession' in the Bible

And I will give the land to you in which you are a stranger, and to your seed after you, all the land of Canaan, for an everlasting possession. And I will be their God.

And He said to me, Behold, I will make you fruitful and multiply you. And I will make of you a multitude of people, and will give this land to your seed after you for an everlasting possession.