Bible Verses About Quotations and Allusions: Hebrews 11:18, »That in Isaac shall thy seed be called.«

But God said to Avraham, "Don't be distressed because of the boy and your slave-girl. Listen to everything Sarah says to you, because it is your descendants through Yitz'chak who will be counted.

indeed, not all the descendants are seed of Avraham; rather, “What is to be called your ‘seed’ will be in Yitz’chak.”

to whom it had been said, “What is called your ‘seed’ will be in Yitz’chak.”