'Eternal' in the Bible

I'm establishing my covenant between me and you, and with your descendants who come after you, generation after generation, as an eternal covenant, to be your God and your descendants' God after you.

I'll give to you and to your descendants the land to which you have traveled all the land of Canaan as an eternal possession. I will be their God."

The servant born in your house or the one purchased with money is to be circumcised. My covenant is to remain in your flesh as an eternal covenant.

But God replied, "No, but your wife Sarah will give birth to your son, and you are to name him Isaac. I'll confirm my covenant with him as an eternal covenant for his descendants.

He told me, "Pay attention! I'm going to make you fruitful and numerous. I'm going to build you into a vast nation of people and then I'll give this land to your descendants for an eternal possession.'

Your father's blessings will prove to be stronger than blessings from the eternal mountains or bounties from the everlasting hills. May they come to rest on Joseph's head, May they be set upon the brow of the one who was separated from his own brothers."