19 And God said, Sarah your wife shall bear you a son indeed; and you shall call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his descendants after him.
Genesis 17:19 Cross References - KJ2000
Genesis 17:21
21 But my covenant will I establish with Isaac, whom Sarah shall bear unto you at this set time in the next year.
Genesis 18:10-14
10 And he said, I will certainly return unto you according to the time of life; and, lo, Sarah your wife shall have a son. And Sarah heard it in the tent door, which was behind him.
11 Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.
12 Therefore Sarah laughed within herself, saying, After I have grown old shall I have pleasure, my lord being old also?
13 And the LORD said unto Abraham, Why did Sarah laugh, saying, Shall I of a certainty bear a child, who am old?
14 Is anything too hard for the LORD? At the time appointed I will return unto you, according to the time of life, and Sarah shall have a son.
Genesis 21:2-3
Genesis 21:6
6 And Sarah said, God has made me to laugh, so that all that hear will laugh with me.
Genesis 26:3
3 Sojourn in this land, and I will be with you, and will bless you; for unto you, and unto your descendants, I will give all these countries, and I will perform the oath which I swore unto Abraham your father;
2 Kings 4:16-17
Luke 1:13-20
13 But the angel said unto him, Fear not, Zachariah: for your prayer is heard; and your wife Elizabeth shall bear you a son, and you shall call his name John.
14 And you shall have joy and gladness; and many shall rejoice at his birth.
15 For he shall be great in the sight of the Lord, and shall drink neither wine nor strong drink; and he shall be filled with the Holy Spirit, even from his mother's womb.
16 And many of the children of Israel shall he turn to the Lord their God.
17 And he shall go before him in the spirit and power of Elijah, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
18 And Zachariah said unto the angel, How shall I know this? for I am an old man, and my wife well advanced in years.
19 And the angel answering said unto him, I am Gabriel, that stands in the presence of God; and am sent to speak unto you, and to show you these glad tidings.
20 And, behold, you shall be dumb, and not able to speak, until the day that these things shall be performed, because you believe not my words, which shall be fulfilled in their time.
Romans 9:6-9
6 Not as though the word of God has taken no effect. For they are not all Israel, who are of Israel:
7 Neither, because they are the descendants of Abraham, are they all children: but, In Isaac shall your descendants be called.
8 That is, They who are the children of the flesh, these are not the children of God: but the children of the promise are counted for the descendants.
9 For this is the word of promise, At this time will I come, and Sarah shall have a son.
Galatians 4:28-31
28 Now we, brethren, as Isaac was, are the children of promise.
29 But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now.
30 Nevertheless what says the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the free woman.
31 So then, brethren, we are not children of the bondwoman, but of the free.