'Forever' in the Bible

and replied to the king, “May the king live forever! Why should I not be sad when the city where my ancestors are buried lies in ruins and its gates have been destroyed by fire?”

Then the Levites, Jeshua, Kadmiel, Bani, Hashabneiah, Sherebiah, Hodiah, Shebaniah and Pethahiah, said, “Arise, bless the Lord your God forever and ever!O may Your glorious name be blessedAnd exalted above all blessing and praise!

On that day they read in the book of Moses in the audience of the people; and therein was found written, that an Ammonite and a Moabite should not enter into the assembly of God forever,