'Forever' in the Bible

then you shall say to them, ‘Because the waters of the Jordan were cut off before the ark of the covenant of the Lord; when it crossed the Jordan, the waters of the Jordan were cut off.’ So these stones shall become a memorial to the sons of Israel forever.”

that all the peoples of the earth may know that the hand of the Lord is mighty, so that you may fear the Lord your God forever.”

So Joshua burned Ai and made it a heap forever, a desolation until this day.

So Moses swore on that day, saying, ‘Surely the land on which your foot has trodden will be an inheritance to you and to your children forever, because you have followed the Lord my God fully.’