19 And God said, Sarah thy wife shall bear thee a son indeed; and thou shalt call his name Isaac: and I will establish my covenant with him for an everlasting covenant, and with his seed after him.
Genesis 17:19 Cross References - Webster
Genesis 17:21
21 But my covenant will I establish with Isaac, whom Sarah shall bear to thee at this set time in the next year.
Genesis 18:10-14
10 And he said, I will certainly return to thee according to the time of life; and lo, Sarah thy 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 far advanced in age; and it ceased to be with Sarah after the manner of women.
12 Therefore Sarah laughed within herself, saying, After I am become old shall I have pleasure, my lord being old also?
13 And the LORD said to Abraham, Why did Sarah laugh, saying, Shall I certainly bear a child, who am old?
14 Is any thing too hard for the LORD? At the time appointed I will return to thee, according to the time of life, and Sarah shall have a son.
Genesis 21:2-3
Genesis 21:6
6 And Sarah said, God hath 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 thee, and will bless thee: for to thee, and to thy seed I will give all these countries, and I will perform the oath which I swore to Abraham thy father;
2 Kings 4:16-17
Luke 1:13-20
13 But the angel said to him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
14 And thou shalt 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 Zacharias said to the angel, By what shall I know this? for I am an old man, and my wife far advanced in years.
19 And the angel answering, said to him, I am Gabriel, who stand in the presence of God; and am sent to speak to thee, and to show thee these glad tidings.
20 And behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words which shall be fulfilled in their season.
Romans 9:6-9
6 Not as though the word of God hath taken no effect. For they are not all Israel, who are descendants from Israel?
7 Neither because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed 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 seed.
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 according to the flesh persecuted him that was born according to the Spirit, even so it is now.
30 Nevertheless, what saith the scripture? Cast out the bond-woman and her son: for the son of the bond-woman shall not be heir with the son of the free-woman.
31 So then, brethren, we are not children of the bond-woman, but of the free.