Parallel
Revelation 9:19
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
Ἡ γὰρ ἐξουσία τῶν ἵππων ἐν τῷ στόματι αὐτῶν ἐστίν, καὶ ἐν ταῖς οὐραῖς αὐτῶν· αἱ γὰρ οὐραὶ αὐτῶν ὅμοιαι ὄφεων, ἔχουσαι κεφαλάς, καὶ ἐν αὐταῖς ἀδικοῦσιν.
For the power of the horses was in their mouths and in their tails; indeed, their tails were like snakes, having heads with which to inflict harm.