'Eternal' in the Bible

and having been made perfect, he became unto all them that obey him the author of eternal salvation;

of the teaching of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment.

nor yet through the blood of goats and calves, but through his own blood, entered in once for all into the holy place, having obtained eternal redemption.

how much more shall the blood of Christ, who through the eternal Spirit offered himself without blemish unto God, cleanse your conscience from dead works to serve the living God?

And for this cause he is the mediator of a new covenant, that a death having taken place for the redemption of the transgressions that were under the first covenant, they that have been called may receive the promise of the eternal inheritance.

Now the God of peace, who brought again from the dead the great shepherd of the sheep with the blood of an eternal covenant, even our Lord Jesus,