Galatians 4:22

4:22 For it is written that Abraham had two sons, one by the ¹  slave woman and the other by the free woman.

Galatians 4:24

4:24 These things may be treated as an allegory, ²  for these women represent two covenants. One is from Mount Sinai bearing children for slavery; this is Hagar.

[4:22]  ¹ tn Paul’s use of the Greek article here and before the phrase “free woman” presumes that both these characters are well known to the recipients of his letter. This verse is given as an example of the category called “well-known (‘celebrity’ or ‘familiar’) article” by ExSyn 225.

[4:24]  ² tn Grk “which things are spoken about allegorically.” Paul is not saying the OT account is an allegory, but rather that he is constructing an allegory based on the OT account.