How does scripture define 'true Israelites'?

The concept of 'true Israelites' transcends physical descent and is defined by spiritual rebirth as articulated by the Apostle Paul in Romans 9:6, where he mentions that not all who are descended from Israel are Israel. This spiritual lineage is marked by faith in Christ, as Paul further explains in Galatians 3:26-29, identifying all who believe in Jesus as the children of God and heirs according to the promise, regardless of ethnic background. Therefore, 'true Israelites' are those chosen by God through grace, reflecting His sovereign will rather than human lineage.