Galatians 4:25

25τὸAndδὲHagarἉγὰρSinaiΣινᾶMountὄροςisἐστὶνinἐντῇArabiaἈραβίᾳ,she correspondsσυστοιχεῖnowδὲto theτῇpresentνῦνJerusalemἸερουσαλήμ,she is in slaveryδουλεύειforγὰρwithμετὰtheτῶνchildrenτέκνωνof herαὐτῆς·

Now Hagar is Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.