'Eternal' in the Bible

and having been perfected, became to all them that obey him, author of eternal salvation;

of the doctrine of washings, and of imposition of hands, and of resurrection of the dead, and of eternal judgment;

nor by blood of goats and calves, but by his own blood, has entered in once for all into the holy of holies, having found an eternal redemption.

how much rather shall the blood of the Christ, who by the eternal Spirit offered himself spotless to God, purify your conscience from dead works to worship the living God?

And for this reason he is mediator of a new covenant, so that, death having taken place for redemption of the transgressions under the first covenant, the called might receive the promise of the eternal inheritance.

But the God of peace, who brought again from among the dead our Lord Jesus, the great shepherd of the sheep, in the power of the blood of the eternal covenant,