'Forever' in the Bible

"The sons of Aaron, the priests, shall blow the trumpets. This shall be to you for a statute forever throughout your generations.

As for the assembly, there shall be one [and the same] statute for you [of the congregation] and for the stranger who is a resident alien with you, a permanent statute throughout your generations; as you are, so shall the stranger be before the Lord.

as a reminder to the sons of Israel so that no layman—that is, one who is not of the descendants of Aaron should approach to offer incense before the Lord; so that he will not become like Korah and as his company—just as the Lord had said to him through Moses.

Then the LORD told Aaron, "Look! I am indeed placing you in charge of my raised offerings and the holy things concerning the Israelis. Because of your anointing, I'm giving you and your sons a prescribed portion forever.

The raised offering and wave offerings presented by the Israelis are yours, too. I've given them to you, to your sons, and to your daughters as a prescribed apportionment forever. Everyone who is clean in your household may eat it.

I'm giving you, your sons, and your daughters as a prescribed portion forever all the raised offerings of the consecrated things that the Israelis offer to the LORD. It's a salt covenant forever before the LORD with you and your descendants with you."

The descendants of Levi are to perform the service of the Tent of Meeting and they are to bear their iniquity. This is to be a statute forever, throughout your generations, that they are not to receive an inheritance among the Israelis,

He who gathers the ashes of the heifer shall wash his clothes, and be unclean until the evening: and it shall be to the children of Israel, and to the stranger who lives as a foreigner among them, for a statute forever.

And he looked [at] Amalek, {uttered} his oracle, and said, "Amalek [is] first of [the] nations, but his future [will be] forever ruin."

Ships will come from the coast of Kittim, and will afflict Asshur, and will afflict Eber, and he will also perish forever."