¹⁹ But God replied, “No—Sarah, your wife, will give birth to a son for you. You will name him Isaac,^[a] and I will confirm my covenant with him and his descendants as an everlasting covenant.

⁶ Well then, has God failed to fulfill his promise to Israel? No, for not all who are born into the nation of Israel are truly members of God’s people! ⁷ Being descendants of Abraham doesn’t make them truly Abraham’s children. For the Scriptures say, “Isaac is the son through whom your descendants will be counted,”^[a] though Abraham had other children, too. ⁸ This means that Abraham’s physical descendants are not necessarily children of God. Only the children of the promise are considered to be Abraham’s children. ⁹ For God had promised, “I will return about this time next year, and Sarah will have a son.”^[b]

²⁸ And you, dear brothers and sisters, are children of the promise, just like Isaac. ²⁹ But you are now being persecuted by those who want you to keep the law, just as Ishmael, the child born by human effort, persecuted Isaac, the child born by the power of the Spirit.

³⁰ But what do the Scriptures say about that? “Get rid of the slave and her son, for the son of the slave woman will not share the inheritance with the free woman’s son.”^{[a] 31} So, dear brothers and sisters, we are not children of the slave woman; we are children of the free woman.

¹³ But the angel said, “Don’t be afraid, Zechariah! God has heard your prayer. Your wife, Elizabeth, will give you a son, and you are to name him John. ¹⁴ You will have great joy and gladness, and many will rejoice at his birth, ¹⁵ for he will be great in the eyes of the Lord. He must never touch wine or other alcoholic drinks. He will be filled with the Holy Spirit, even before his birth.^{[a] 16} And he will turn many Israelites to the Lord their God. ¹⁷ He will be a man with the spirit and power of Elijah. He will prepare the people for the coming of the Lord. He will turn the hearts of the fathers to their children,^[b] and he will cause those who are rebellious to accept the wisdom of the godly.”

¹⁸ Zechariah said to the angel, “How can I be sure this will happen? I’m an old man now, and my wife is also well along in years.”

¹⁹ Then the angel said, “I am Gabriel! I stand in the very presence of God. It was he who sent me to bring you this good news! ²⁰ But now, since you didn’t believe what I said, you will be silent and unable to speak until the child is born. For my words will certainly be fulfilled at the proper time.”

⁶ And Sarah declared, “God has brought me laughter.^[a] All who hear about this will laugh with me.

² She became pregnant, and she gave birth to a son for Abraham in his old age. This happened at just the time God had said it would. ³ And Abraham named their son Isaac.

¹⁶ “Next year at this time you will be holding a son in your arms!”

“No, my lord!” she cried. “O man of God, don’t deceive me and get my hopes up like that.”

¹⁷ But sure enough, the woman soon became pregnant. And at that time the following year she had a son, just as Elisha had said.

¹⁰ Then one of them said, “I will return to you about this time next year, and your wife, Sarah, will have a son!”

Sarah was listening to this conversation from the tent. ¹¹ Abraham and Sarah were both very old by this time, and Sarah was long past the age of having children. ¹² So she laughed silently to herself and said, “How could a worn-out woman like me enjoy such pleasure, especially when my master—my husband—is also so old?”

¹³ Then the Lord said to Abraham, “Why did Sarah laugh? Why did she say, ‘Can an old woman like me have a baby?’ ¹⁴ Is anything too hard for the Lord? I will return about this time next year, and Sarah will have a son.”

³ Live here as a foreigner in this land, and I will be with you and bless you. I hereby confirm that I will give all these lands to you and your descendants,^[a] just as I solemnly promised Abraham, your father.

²¹ But my covenant will be confirmed with Isaac, who will be born to you and Sarah about this time next year.”