Genesis 13v14-15 The Promise of the Land

God promised the land to Abraham and his seed.
Genesis 13:14-15 (KJV): "14 And the LORD said unto Abram, after that Lot was separated from him, Lift up now thine eyes, and look from the place where thou art northward, and southward, and eastward, and westward: 15 For all the land which thou seest, to thee will I give it, and to thy seed for ever."

Paul states that this seed is Christ.
Galatians 3:16 (KJV): "Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ."

The Gentile believers at Galatia, and all who have believed the gospel of Christ and are baptised also inherit the land promise of Genesis 13:15:
Galatians 3:26-29 (KJV): "26 For ye are all the children of God by faith in Christ Jesus. 27 For as many of you as have been baptized into Christ have put on Christ. 28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. 29 And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise."

Paul shows that the nation of Israel were not heirs to the land through the Law. They were temporary tenants.
Romans 4:13-16 (KJV): "13 For the promise, that he should be the heir of the world, was not to Abraham, or to his seed, through the law, but through the righteousness of faith. 14 For if they which are of the law be heirs, faith is made void, and the promise made of none effect: 15 Because the law worketh wrath: for where no law is, there is no transgression. 16 Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,"

The land promise is to all the faithful from Eden to the coming of Christ because they will be resurrected to receive everlasting life and they will inherit the land for ever.
Genesis 13:15 (KJV): "For all the land which thou seest, to thee will I give it, and to thy seed for ever."
Matthew 5:5 (KJV): "Blessed are the meek: for they shall inherit the earth."
Hebrews 11:39-40 (KJV): "39 And these all, having obtained a good report through faith, received not the promise: 40 God having provided some better thing for us, that they without us should not be made perfect."

Kind regards
Trevor