And by faith even Sarah, who was past childbearing age, was enabled to bear children because she considered him faithful who had made the promise.
But the woman became pregnant, and the next year about that same time she gave birth to a son, just as Elisha had told her.
Even Elizabeth your relative is going to have a child in her old age, and she who was said to be unable to conceive is in her sixth month.
In other words, it is not the children by physical descent who are God’s children, but it is the children of the promise who are regarded as Abraham’s offspring.
His son by the slave woman was born according to the flesh, but his son by the free woman was born as the result of a divine promise.
Let us hold unswervingly to the hope we profess, for he who promised is faithful.