Genesis 21:12

Thus Abraham had better authority for his divorce from Hagar than he had for his marriage with her, Genesis 16:2. Thy seed, to wit, the promised Seed, the heir of thy estate, covenant, and promises, the progenitor of my church and people, and particularly of the Messias. Called, i.e. reputed and valued, both by me and other men. The words may be thus rendered, by Isaac shall thy seed be; for to be called is ofttimes put for to be, as Isaiah 1:26, Isaiah 47:1,5 Mt 5:9,19.