And Sarah my master’s wife bore a son to my master when she was old, and he has given him all that he has.
So she said to Abraham, “Cast out this slave woman with her son, for the son of this slave woman shall not inherit along with my son Isaac.”
Abraham gave all he had to Isaac.
He did not weaken in faith when he considered his own body, which was already as good as dead (for he was about a hundred years old), and the barrenness of Sarah’s womb.