'Once' in the Bible

and from Jesus Christ, the faithful and trustworthy Witness, the Firstborn of the dead, and the Ruler of the kings of the earth. To Him who [always] loves us and who [has once for all] freed us [or washed us] from our sins by His own blood (His sacrificial death)—

Be mindful, therefore, of the height from which you have fallen. Repent at once, and act as you did at first, or else I will surely come and remove your lampstand out of its place--unless you repent.

Repent, at once; or else I will come to you quickly, and will make war upon them with the sword which is in My mouth.

At once I was in [special communication with] the Spirit; and behold, a throne stood in heaven, with One seated on the throne.

Then the voice which I had heard speaking from Heaven once more addressed me. It said, "Go and take the little book which lies open in the hand of the angel who is standing on the sea and on the land."

So I took the little book from the angel’s hand and ate it, and in my mouth it was as sweet as honey; but once I had swallowed it, my stomach was bitter.

The beast that you saw existed once, but is no longer, and is going to crawl out of the bottomless pit and then proceed to its destruction. Those living on earth, whose names were not written in the Book of Life from the foundation of the world, will be surprised when they see the beast because it was, is no longer, and will come again.

And the beast that [once] was but is not, is himself also an eighth king and is one of the seven, and he goes to destruction (perdition).

And I saw the Wild Beast, and the kings of the earth, and their armies, all assembled to make war, once for all, against the Rider upon the horse and against His army. And the Wild Beast was captured, and with him the false Prophet