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