Revelation 1:15

‘And his voice as the voice of many waters.’

In Ezekiel 43:2 we are told that God’s voice was ‘like the sound of many waters’ as the glory of God came and the earth shone with His glory. This is clearly reflected here. Later the sound of heavenly voices is also described in these terms (Revelation 14:2; Revelation 19:6). So the voice of the ‘son of man’ is as the voice of God and as the voice of a heavenly multitude, demonstrating His supreme power (compare and contrast ‘as of a trumpet’ Revelation 1:10).