'Perpetual' in the Bible

When the rainbow is in the clouds, I will notice it and remember the perpetual covenant between God and all living creatures of all kinds that are on the earth."

I will confirm my covenant as a perpetual covenant between me and you. It will extend to your descendants after you throughout their generations. I will be your God and the God of your descendants after you.

God said, "No, Sarah your wife is going to bear you a son, and you will name him Isaac. I will confirm my covenant with him as a perpetual covenant for his descendants after him.