'Perpetual' in the Bible

I will turn you into a perpetual desolation, and your cities will not be inhabited. Then you will know that I am the Lord.

I will make a covenant of peace with them; it will be a perpetual covenant with them. I will establish them, increase their numbers, and place my sanctuary among them forever.

And you will provide a grain offering with it morning by morning, a sixth of an ephah, and a third of a gallon of olive oil to moisten the choice flour, as a grain offering to the Lord; this is a perpetual statute.

Thus they will provide the lamb, the grain offering, and the olive oil morning by morning, as a perpetual burnt offering.