“And yet for all that, when they be in the land of their enemies, I will not cast them away, neither will I abhor them, to destroy them utterly, and to break My covenant with them: for I am the LORD their God.” Leviticus 26:44 (KJV)
In reading chapter 26 you will quickly realize God’s promises to Israel concerning their living in the Promised land. If they are obedient unto the LORD, and His commandments, laws; for themselves, their offerings, their Sabbaths for themselves, their animals, their servants, and for the land, etc. then they will be blessed. They would be protected, and without fear drive out those who are their enemies.
Then, the final verses are warnings of what will happen should they become disobedient, and follow their own hearts, disobey God, then, they would be cast out of the land, be driven and taken into foreign lands; living in fear.
As Christians we all enjoy the promises of God. The above promise is made to Israel. It is a marvelous promise. It is also one that the Christian can apply because the apostle Paul tells us also,,,
“I say then, Hath God cast away His people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin. God hath not cast away His people which He foreknew. Wot ye not what the scripture saith of Elias? How he maketh intercession to God against Israel, saying, Lord, they have killed Thy prophets, and digged down thine altars; and I am left alone, and they seek my life. But what saith the answer of God unto him? I have reserved to Myself seven thousand men, who have not bowed the knee to the image of Baal. Even so then at this present time also there is a remnant according to the election of grace.” Romans 11:1-5
Because of the atoning death of Jesus Christ on the cross He has fulfilled all the requirements of the Law of God, and all people who trust Jesus as Lord and Saviour are given eternal life, and have the promise of God, “I will not cast them away”. It is His covenant with His people.