For their power is in their mouth, and in their tails: for their tails were like unto serpents, with heads, and with them they do hurt.
All Commentaries on Revelation 9:19 Go To Revelation 9
Bede
AD 735
tails: That is, in the their speech and office. For "the prophet that teacheth a lie, he is the tail," for he conceals a part which is in a manner hidden and unclean by the volubility of a flattering tongue, saying to the ungodly, "Thou art good."