Romans 11:1-5
Then I ask, "Did God reject His [own] people [i.e., the Jews]?" Certainly not! For I am an Israelite too, a descendant of Abraham and a member of the tribe of Benjamin.
Romans 11:26-29
And so [i.e., in this way] all the Israelites will be saved. [Note: The "all" here is thought by many to refer to a large number of the physical Jews who will be saved, not necessarily to every single individual Jew]. Even as it is written [Isa. 59:20-21], "The Deliverer [i.e., Christ] will come from Zion [i.e., the city of Jerusalem, or from the nation of Israel]. He will take away the wickedness from Jacob [i.e., the Jews]."
Treasury of Scripture Knowledge
Summary
Thus saith the LORD; If heaven above can be measured, and the foundations of the earth searched out beneath, I will also cast off all the seed of Israel for all that they have done, saith the LORD.
Bible References
I
Romans 11:2
God did not reject His people whom He knew previously. Or, do you not know what the Scriptures say in the passage where Elijah pleads with God against Israel?