19 And God said, Not so; but Sarah, your wife, will have a son, and you will give him the name Isaac, and I will make my agreement with him for ever and with his seed after him.
And Sarah became with child, and gave Abraham a son when he was old, at the time named by God. And Abraham gave to his son, to whom Sarah had given birth, the name Isaac.
But the angel said, Have no fear, Zacharias, for your prayer has come to the ears of God, and your wife Elisabeth will have a son, and his name will be John. And you will be glad and have great delight; and numbers of people will have joy at his birth. For he will be great in the eyes of the Lord; he will not take wine or strong drink; and he will be full of the Spirit of God from his birth. And through him great numbers of the children of Israel will be turned to the Lord their God. And he will go before his face in the spirit and power of Elijah, turning the hearts of fathers to their children, and wrongdoers to the way of righteousness; to make ready a people whose hearts have been turned to the Lord. And Zacharias said to the angel, How may I be certain of this? For I am an old man, and my wife is far on in years. And the angel, answering, said, I am Gabriel, whose place is before God; I have been sent to say these words to you and to give you this good news. Now, see, you will be without voice or language till the day when these things come about, because you had not faith in my words, which will have effect at the right time.
But it is not as if the word of God was without effect. For they are not all Israel, who are of Israel: And they are not all children because they are the seed of Abraham; but, In Isaac will your seed be named. That is, it is not the children of the flesh, but the children of God's undertaking, who are named as the seed. For this is the word of God's undertaking, At this time will I come, and Sarah will have a son.
Now we, brothers, as Isaac was, are the children of the undertaking of God. But as in those days he who had birth after the flesh was cruel to him who had birth after the Spirit, even so it is now. What then do the Writings say? Send away the servant-woman and her son; for the son of the servant-woman will not have a part in the heritage with the son of the free woman. So, brothers, we are not children of the servant-woman, but of the free woman.
And he said, I will certainly come back to you in the spring, and Sarah your wife will have a son. And his words came to the ears of Sarah who was at the back of the tent-door. Now Abraham and Sarah were very old, and Sarah was past the time for giving birth. And Sarah, laughing to herself, said, Now that I am used up am I still to have pleasure, my husband himself being old? And the Lord said, Why was Sarah laughing and saying, Is it possible for me, being old, to give birth to a child? Is there any wonder which the Lord is not able to do? At the time I said, in the spring, I will come back to you, and Sarah will have a child.
And Elisha said, At this time in the coming year you will have a son in your arms. And she said, No, my lord, O man of God, do not say what is false to your servant. Then the woman became with child and gave birth to a son at the time named, in the year after, as Elisha had said to her.
Worthy.Bible » Commentaries » Matthew Henry Commentary » Commentary on Genesis 17
Commentary on Genesis 17 Matthew Henry Commentary
Chapter 17
This chapter contains articles of agreement covenanted and concluded upon between the great Jehovah, the Father of mercies, on the one part, and pious Abram, the father of the faithful, on the other part. Abram is therefore called "the friend of God,' not only because he was the man of his counsel, but because he was the man of his covenant; both these secrets were with him. Mention was made of this covenant (ch. 15:18), but here it is particularly drawn up, and put into the form of a covenant, that Abram might have strong consolation. Here are,
Gen 17:1-3
Here is,
Gen 17:4-6
The promise here is introduced with solemnity: "As for me,' says the great God, "behold, behold and admire it, behold and be assured of it, my covenant is with thee;' as before (v. 2), I will make my covenant. Note, The covenant of grace is a covenant of God's own making; this he glories in (as for me), and so may we. Now here,
Gen 17:7-14
Here is,
Gen 17:15-22
Here is,
Gen 17:23-27
We have here Abraham's obedience to the law of circumcision. He himself and all his family were circumcised, so receiving the token of the covenant and distinguishing themselves from other families, that had no part nor lot in the matter.