How do we know that Christ died for His sheep?

In John 10:15, Jesus states, 'I lay down my life for the sheep,' indicating that His sacrificial death is intentional and for a particular group, referred to as His sheep. This aligns with the doctrine of limited atonement within Reformed theology, which teaches that Christ's redemptive work is effective for those chosen by the Father. This assurance comes from the understanding that the sacrifice of Christ is sufficient for the salvation of all whom He died for, thus validating that He will not lose any of His own (John 10:28).