Charles Ellicott Commentary Hebrews 11:18

"even he to whom it was said, In Isaac shall thy seed be called:" — Hebrews 11:18 (ASV)

Of whom.—That is, Isaac. But the Greek words should perhaps be rendered to whom (Abraham): “Even he to whom it was said.” On this quotation from Genesis 21:12 see the Note on Romans 9:7.