But God replied, "Your wife Sarah will indeed bear you a son, and you are to name him Isaac. I will establish My covenant with him as an everlasting covenant for his descendants after him.

Luke 1:55
as He promised to our fathers, to Abraham and his descendants forever."

Hebrews 11:11
By faith Sarah, even though she was barren and beyond the proper age, was enabled to conceive a child, because she considered Him faithful who had promised.

Genesis 9:16
And whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and every living creature of every kind that is on the earth."

Genesis 17:7
I will establish My covenant as an everlasting covenant between Me and you and your descendants after you, to be your God and the God of your descendants after you.

Genesis 17:16
And I will bless her and will surely give you a son by her. I will bless her, and she will be the mother of nations; kings of peoples will descend from her."

Genesis 17:18
And Abraham said to God, "O that Ishmael might live under Your blessing!"

Genesis 17:21
But I will establish My covenant with Isaac, whom Sarah will bear to you at this time next year."

Genesis 18:10
Then the LORD said, "I will surely return to you at this time next year, and your wife Sarah will have a son!" Now Sarah was behind him, listening at the entrance to the tent.

Genesis 21:2
So Sarah conceived and bore a son to Abraham in his old age, at the very time God had promised.

Genesis 21:3
And Abraham gave the name Isaac to the son Sarah bore to him.

Genesis 26:2
The LORD appeared to Isaac and said, "Do not go down to Egypt. Settle in the land where I tell you.

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 seed after him.