For it is written that Abraham had two sons: one by a servant woman, and one by a free woman
Other versions
King James Version
For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.English Standard Version
For it is written that Abraham had two sons, one by a slave woman and one by a free woman.New International Version
For it is written that Abraham had two sons, one by the slave woman and the other by the free woman.