Parallel
Revelation 10:3
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
καὶ ἔκραξεν φωνῇ μεγάλῃ ὥσπερ λέων μυκᾶται· καὶ ὅτε ἔκραξεν, ἐλάλησαν αἱ ἑπτὰ βρονταὶ τὰς ἑαυτῶν φωνάς.
Then he cried out in a loud voice like the roar of a lion. And when he cried out, the seven thunders sounded their voices.