'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)—

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

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 was [once], but [now] is not, and he is about to come up out of the abyss (the bottomless pit, the dwelling place of demons) and go to destruction (perdition). And the inhabitants of the earth, whose names have not been written in the Book of Life from the foundation of the world, will be astonished when they see the beast, because he was and is not and is yet to come [to earth].

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).