Revelation 10:3

ὥσπερ λέων (of God in O.T. reff.; of the messiah 4 Esd. 11:37, 12:31) μυκᾶται Theokr. Id. xxvi. 21, μύκημα λεαίνης, properly of cattle =“to bellow”. ἐλάλησαν κ. τ. λ. = “uttered what they had to say” (i.e., spoke articulately). αἱ (the well-known or familiar) βρονταί “of the apocalyptic machinery” (Alford), or a popular piece of apocalyptic prophecy (see below). Cf. the sevenfold voice of the Lord in thunder, Psalms 29. The seven thunders here may be conceived loosely as the echoes of the angel's voice reverberating through the universe (Spitta, Weiss), thunder, throughout the ancient world, being especially venerated as a divine voice or warning.