Abraham: Isaac Born To
Source: Nav
Genesis 21:2, 3
So Sarah conceived and bore a son to Abraham in his old age, at the very time God had promised. / And Abraham gave the name Isaac to the son Sarah bore to him.
Galatians 4:22–30
For it is written that Abraham had two sons, one by the slave woman and the other by the free woman. / His son by the slave woman was born according to the flesh, but his son by the free woman was born through the promise. / These things serve as illustrations, for the women represent two covenants. One covenant is from Mount Sinai and bears children into slavery: This is Hagar.