Matthew Poole and continuators on Revelation 8:13

13 And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Wo, wo, wo to the inhabitants of the earth, by reason of the other voices of the trumpet of the three angels which are yet to sound .

This Verse is but an Introduction to the other three Angels sounding▪ declaring that the times which were to follow▪ would be much more full of Miseries and Woes to the Inhabitants of the Earth: By which I understand all those Countries which lately were subject to the Roman Empire. Others understand the more earthy, unsound, hypocritical part of the Church. The Wo is thrice repeated, either to shew the greatness of the Calamities, or rather correspondently to the Number of the Angels yet to sound.