Parallel
Revelation 8:1
Patriarchal Greek New Testament (1904) · Berean Standard Bible
Καὶ ὅτε ἤνοιξε τὴν σφραγῖδα τὴν ἑβδόμην, ἐγένετο σιγὴ ἐν τῷ οὐρανῷ ὡς ἡμιώριον.
When the Lamb opened the seventh seal, there was silence in heaven for about half an hour.