'Once' in the Bible

For the death he died, he died to sin once for all, but the life he lives, he lives to God.

(I am speaking in human terms because of the weakness of your flesh.) For just as you once presented your members as slaves to impurity and lawlessness leading to more lawlessness, so now present your members as slaves to righteousness leading to sanctification.

And I was once alive apart from the law, but with the coming of the commandment sin became alive