To which passage of Scripture is Paul referring when he is speaking about Abraham's two sons and who were those sons?
Paul is referring to Genesis 16:1 – 17:27 and Genesis 21:1–34. The two sons in view are Ishmael, the son of the slave woman Hagar, and Isaac, the son of Sarah.
22 Car il est écrit qu'Abraham eut deux fils, un de la femme esclave, et un de la femme libre.