Parallel
Galatians 4:25
Patriarchal Greek New Testament (1904) · Berean Standard Bible
τὸ γὰρ Ἄγαρ Σινᾶ ὄρος ἐστὶν ἐν τῇ Ἀραβίᾳ, συστοιχεῖ δὲ τῇ νῦν Ἱερουσαλήμ, δουλεύει δὲ μετὰ τῶν τέκνων αὐτῆς·
Now Hagar stands for Mount Sinai in Arabia and corresponds to the present-day Jerusalem, because she is in slavery with her children.