Revelation 9:19

For their power is in their mouth, and in their tails: for their tails were like unto serpents, and had heads, and with them they do hurt.

Ver. 19. In their mouth, and in their tails] Like the serpent Amphisbaena, a that hath a head (to do hurt) at both ends. (Plin.) Perhaps the Turks' perfidy is here pointed at; they keep leagues no longer than standeth with their own profit. (Turk. Hist.)

a A fabled serpent of the ancients, with a head at each end, and able to move in either direction ŒD