what does the bible say?
The Bible is not explicit regarding Ishmael’s salvation, so Christians disagree on this point. The core question is whether Paul excluded Ishmael in Romans 9:6–8, where Abraham’s true offspring are not ethnic but the “children of the promise” who came through Isaac. Arguments against him being saved: God’s promise to Abraham (Genesis 12:1–7) passed to Isaac (Genesis 17:19–21), and Paul used Ishmael to exemplify unbelieving Jews (Galatians 4:21–31). It also argues that Paul’s point in Romans 9 was to show that not all ethnic Jews were children of the promise, making it odd to focus on Isaac's line if he thought Ishmael might also have been saved. Arguments for his being saved: God blessed his line (Genesis 17:20), and Genesis notes that God was with Ismael (Genesis 21:20). This view argues that Scripture focuses on Isaac because Israel came from his line, not because God rejected Ishmael. It also holds that Paul’s uses of Ishmael and Isaac are illustrative, without making an explicit statement about Ishmael’s salvation. Both arguments have good points, though the first is somewhat stronger. Since Scripture never clearly shows Ishmael believing or disbelieving, it’s best not to draw too firm a conclusion. When Scripture doesn’t answer a question like this, it’s because it isn't necessary to our spiritual walk. Therefore, though it's an interesting question, we must first consider our own salvation, ensuring we are saved before we wonder whether Ishmael was!