For it is written, that Abraham had two sons, the one by a bondmaid, the other by a free woman.
All Commentaries on Galatians 4:22 Go To Galatians 4
Cornelius a Lapide
AD 1637
Abraham had two sons. Ishmael, by his handmaiden, Hagar, who was, therefore, but a wife of secondary rank; and Isaac, by Sarah, his wife of honour. The latter was his heir; the former received such gifts as the father chose to give him. Cf. Gen. xxv5 , 6.