Even when Sarah was too old to have children, she had faith that God would do what he had promised, and she had a son.
But a few months later, the woman got pregnant. She gave birth to a son, just as Elisha had promised.
Your relative Elizabeth is also going to have a son, even though she is old. No one thought she could ever have a baby, but in three months she will have a son.
The son of the slave woman was born in the usual way. But the son of the free woman was born because of God's promise.
We must hold tightly to the hope that we say is ours. After all, we can trust the one who made the agreement with us.