Parallel
Revelation 9:19
Nestle 1904 Greek New Testament · Berean Standard Bible
ἡ γὰρ ἐξουσία τῶν ἵππων ἐν τῷ στόματι αὐτῶν ἐστιν καὶ ἐν ταῖς οὐραῖς αὐτῶν αἱ γὰρ οὐραὶ αὐτῶν ὅμοιαι ὄφεσιν 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.