25. Translate, "For this word, Hagar, is (imports) Mount Sinai in Arabia (that is, among the Arabians--in the Arabian tongue)." So CHRYSOSTOM explains. Haraut, the traveller, says that to this day the Arabians call Sinai, "Hadschar," that is, Hagar, meaning a rock or stone. Hagar twice fled into the desert of Arabia (Ge 16:1-16; 21:9-21): from her the mountain and city took its name, and the people were called Hagarenes. Sinai, with its rugged rocks, far removed from the promised land, was well suited to represent the law which inspires with terror, and the spirit of bondage.
      answereth--literally, "stands in the same rank with"; "she corresponds to."
      Jerusalem which now is--that is, the Jerusalem of the Jews, having only a present temporary existence, in contrast with the spiritual Jerusalem of the Gospel, which in germ, under the form of the promise, existed ages before, and shall be for ever in ages to come.
      and--The oldest manuscripts read, "For she is in bondage." As Hagar was in bondage to her mistress, so Jerusalem that now is, is in bondage to the law, and also to the Romans: her civil state thus being in accordance with her spiritual state [BENGEL].

JFB.