Parallel
Revelation 17:9
Patriarchal Greek New Testament (1904) · Berean Standard Bible
Ὧδε ὁ νοῦς ὁ ἔχων σοφίαν. αἱ ἑπτὰ κεφαλαὶ ὄρη ἑπτά εἰσιν, ὅπου ἡ γυνὴ κάθηται ἐπ᾽ αὐτῶν,
This calls for a mind with wisdom. The seven heads are seven mountains on which the woman sits.