Christians are not promised the land. That promise remains Israel's promise. The inheritance spoken of here is our salvation.
Christians are promised that Land. Paul said in Hebrews it was their anchor of the Soul. He told the Galatians,
5 He therefore that ministereth to you the Spirit, and worketh miracles among you,
doeth he it by the works of the law, or by the hearing of faith?
6 Even as Abraham believed God, and it was accounted to him for righteousness.
7 Know ye therefore that
they which are of faith, the same are the children of Abraham.
8 And
the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed. 9 So then they which be of faith are blessed with faithful Abraham. 10 For as many as are of the works of the law are under the curse: for it is written, Cursed
is every one that continueth not in all things which are written in the book of the law to do them.
11 But that no man is justified by the law in the sight of God,
it is evident: for, The just shall live by faith.
12 And the law is not of faith: but, The man that doeth them shall live in them.
13 Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed
is every one that hangeth on a tree:
14 That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith.
15 Brethren, I speak after the manner of men; Though
it be but a man's covenant, yet
if it be confirmed, no man disannulleth, or addeth thereto.
16 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. 17 And this I say,
that the covenant, that was confirmed before of God in Christ, the law, which was four hundred and thirty years after, cannot disannul, that it should make the promise of none effect.
18 For if the inheritance be of the law, it is no more of promise: but God gave it to Abraham by promise.
19 Wherefore then
serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made;
and it was ordained by angels in the hand of a mediator.
20 Now a mediator is not
a mediator of one, but God is one.
21 Is the law then against the promises of God? God forbid: for if there had been a law given which could have given life, verily righteousness should have been by the law.
22 But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
23 But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.
24 Wherefore the law was our schoolmaster
to bring us unto Christ, that we might be justified by faith.
25 But after that faith is come, we are no longer under a schoolmaster.
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.
(Gal 3:1 KJV)
The "blessing of Abraham" only appears twice in Scripture here and in Genesis 28:4 Where it specifically refers to the land as the inheritance
KJV Genesis 28:4 And give thee the blessing of Abraham, to thee, and to thy seed with thee; that thou mayest inherit the land wherein thou art a stranger, which God gave unto Abraham.
Paul said it's through Christ that the blessing of Abraham might come on the Gentiles.