Commentary Critical and Explanatory on the Whole Bible - Hebrews 11:18
18. Of whom—rather as Greek "He (Abraham, not Isaac) TO whom it was said" [ALFORD]. BENGEL supports English Version. So :- uses the same Greek preposition, "unto," for "in respect to," or "of." This verse gives a definition of the "only-begotten Son" ( :-). in Isaac shall thy seed be called— (Genesis 21:12). The posterity of Isaac alone shall be accounted as the seed of Abraham, which is the heir of the promises (Genesis 21:12- :). read more
E.W. Bullinger's Companion Bible Notes - Hebrews 11:18
Of = With reference to. Greek. pros. App-104 . shall, &c . Literally shall a seed be called for thee. This is quoted from Genesis 21:12 . read more