'Once' in the Bible

Who has no need to make offerings for sins every day, like those high priests, first for himself, and then for the people; because he did this once and for ever when he made an offering of himself.

But only the high priest went into the second, once a year, not without making an offering of blood for himself and for the errors of the people:

And has gone once and for ever into the holy place, having got eternal salvation, not through the blood of goats and young oxen, but through his blood.

And because by God's law death comes to men once, and after that they are judged;

By that pleasure we have been made holy, by the offering of the body of Jesus Christ once and for ever.