The land of Israel was given to the descendants of Abraham forever. Physical mankind will go on forever. Physical obedience to God produces physical blessings.

Psa 25:14  The secret of the LORD is with those who fear Him, And He will show them His covenant.

Gen 12:2  I will make you a great nation; I will bless you And make your name great; And you shall be a blessing.

Psa 105:8  He remembers His covenant forever, The word which He commanded, for a thousand generations,

Physical Israel goes on forever.

Isa 59:21  “As for Me,” says the LORD, “this is My covenant with them: My Spirit who is upon you, and My words which I have put in your mouth, shall not depart from your mouth, nor from the mouth of your descendants, nor from the mouth of your descendants’ descendants,” says the LORD, “from this time and forevermore.”

Heb 11:8  By faith Abraham obeyed when he was called to go out to the place which he would receive as an inheritance. And he went out, not knowing where he was going.

Gal 3:29  And if you are Christ’s, then you are Abraham’s seed, and heirs according to the promise.