The Bible teaches that the land of Israel was promised to Abraham, Isaac and Jacob and their descendants for an everlasting possession.
He (God) remembers his covenant forever, the word that he commanded, for a thousand generations, the covenant that he made with Abraham, his sworn promise to Isaac, which he confirmed to Jacob as a statute, to Israel as an everlasting covenant, saying, “To you I will give the land of Canaan as your portion for an inheritance.”
Psalm 105:8-11
After the Exodus from Egypt and 40 years in the wilderness Moses told the Children of Israel about this special relationship which existed between them and God.
For you are a people holy to the LORD your God. The LORD your God has chosen you to be a people for his treasured possession, out of all the peoples who are on the face of the earth.
Deuteronomy 7:6
Moses went on to explain why Israel was so important to God.
It was not because you were more in number than any other people that the LORD set his love on you and chose you, for you were the fewest of all peoples, but it is because the LORD loves you and is keeping the oath that he swore to your fathers, that the LORD has brought you out with a mighty hand and redeemed you from the house of slavery, from the hand of Pharaoh king of Egypt.
Deuteronomy 7:7-8
Although their descendants failed to keep God’s commandments and rejected Jesus as their promised Messiah, God has not cast them off as stated by the apostle Paul.
I ask, then, has God rejected his people? By no means! For I myself am an Israelite, a descendant of Abraham, a member of the tribe of Benjamin. God has not rejected his people whom he foreknew…
Lest you be wise in your own sight, I do not want you to be unaware of this mystery, brothers: a partial hardening has come upon Israel, until the fullness of the Gentiles has come in. And in this way all Israel will be saved, as it is written, “The Deliverer will come from Zion, he will banish ungodliness from Jacob”; “and this will be my covenant with them when I take away their sins.”
Romans 11:1-2, 25-27
Further reading on this and other topics is available on the website of the Christadelphian Office:
