Revelation 9:11-13

New English Translation

¹¹They have as king over them the angel of the abyss, whose name in Hebrew is Abaddon, and in Greek, Apollyon.^[a]

¹²The first woe has passed, but^[b] two woes are still coming after these things!

¹³Then^[c] the sixth angel blew his trumpet, and I heard a single voice coming from the^[d] horns on the golden altar that is before God,

Revelation 9:11 sn Both the Hebrew Abaddon and the Greek Apollyon mean “Destroyer.”
Revelation 9:12 tn Grk “behold.” Here ἰδού (idou) has been translated as “but” to indicate the contrast present in the context.
Revelation 9:13 tn Here καί (kai) has been translated as “then” to indicate the implied sequence of events within the vision.
Revelation 9:13 tc ‡ Several key mss (P⁴⁷ א¹ A 0207 1611 2053 2344 lat sy^h co) lack the word τεσσάρων (tessarōn, “four”) before κεράτων (keratōn, “horns”). The word seems to have been added by scribes because a “horned” altar (described in the OT [Exod 30:2, 10]) could have only four “horns” or projections at the corners. NA²⁸ includes the word in brackets, indicating doubts as to its authenticity.

New English Translation (NET)