The New John Gill Exposition of the Entire BibleGenesis 11:30
But Sarai was barren; she had no child.
] Aben Ezra
observes, there are some that say that Abraham was impotent, and not
Sarai barren; the very reverse of the Scriptures; but as he rightly
adds, his son Ishmael and his sons by Keturah show the contrary, see
(Genesis 15:2) (16:1) .