Genesis 21:10-12
and she said to Abraham, “Expel the slave woman and her son, for the slave woman’s son will never share in the inheritance with my son Isaac!” / Now this matter distressed Abraham greatly because it concerned his son Ishmael. / But God said to Abraham, “Do not be distressed about the boy and your maidservant. Listen to everything that Sarah tells you, for through Isaac your offspring will be reckoned.

Genesis 24:36
My master’s wife Sarah has borne him a son in her old age, and my master has given him everything he owns.

Genesis 12:7
Then the LORD appeared to Abram and said, “I will give this land to your offspring.” So Abram built an altar there to the LORD, who had appeared to him.

Genesis 17:19-21
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. / As for Ishmael, I have heard you, and I will surely bless him; I will make him fruitful and multiply him greatly. He will become the father of twelve rulers, and I will make him into a great nation. / But I will establish My covenant with Isaac, whom Sarah will bear to you at this time next year.”

Genesis 26:3-5
Stay in this land as a foreigner, and I will be with you and bless you. For I will give all these lands to you and your offspring, and I will confirm the oath that I swore to your father Abraham. / I will make your descendants as numerous as the stars in the sky, and I will give them all these lands, and through your offspring all nations of the earth will be blessed, / because Abraham listened to My voice and kept My charge, My commandments, My statutes, and My laws.”

Genesis 28:4
And may He give the blessing of Abraham to you and your descendants, so that you may possess the land where you dwell as a foreigner, the land God gave to Abraham.”

Genesis 35:12
The land that I gave to Abraham and Isaac I will give to you, and I will give this land to your descendants after you.”

Genesis 48:4
and told me, ‘Behold, I will make you fruitful and multiply you; I will make you a multitude of peoples, and will give this land to your descendants after you as an everlasting possession.’

Genesis 49:28-33
These are the tribes of Israel, twelve in all, and this was what their father said to them. He blessed them, and he blessed each one with a suitable blessing. / Then Jacob instructed them, “I am about to be gathered to my people. Bury me with my fathers in the cave in the field of Ephron the Hittite. / The cave is in the field of Machpelah near Mamre, in the land of Canaan. This is the field Abraham purchased from Ephron the Hittite as a burial site. ...

Exodus 32:13
Remember Your servants Abraham, Isaac, and Israel, to whom You swore by Your very self when You declared, ‘I will make your descendants as numerous as the stars in the sky, and I will give your descendants all this land that I have promised, and it shall be their inheritance forever.’”

Romans 9:7-9
Nor because they are Abraham’s descendants are they all his children. On the contrary, “Through Isaac your offspring will be reckoned.” / So it is not the children of the flesh who are God’s children, but it is the children of the promise who are regarded as offspring. / For this is what the promise stated: “At the appointed time I will return, and Sarah will have a son.”

Galatians 4:28-31
Now you, brothers, like Isaac, are children of promise. / At that time, however, the son born by the flesh persecuted the son born by the Spirit. It is the same now. / But what does the Scripture say? “Expel the slave woman and her son, for the slave woman’s son will never share in the inheritance with the free woman’s son.” ...

Hebrews 11:18
even though God had said to him, “Through Isaac your offspring will be reckoned.”

Acts 7:5
He gave him no inheritance here, not even a foot of ground. But God promised to give possession of the land to Abraham and his descendants, even though he did not yet have a child.

Romans 4:13
For the promise to Abraham and his offspring that he would be heir of the world was not given through the law, but through the righteousness that comes by faith.