How do we know Christ's redemption is particular?

The doctrine of particular redemption teaches that Christ died specifically for those chosen by God, rather than for all humanity indiscriminately. In the context of Ruth, when Boaz redeems Ruth, it highlights that his act of redemption was focused on individuals rather than a broad crowd. This principle is supported by scriptures like Ephesians 1:5, which states that believers are predestinated to adoption through Jesus Christ. Hence, the redemption of Christ is effective for His elect, ensuring that it truly brings salvation to those whom God has chosen.