How do we know Jesus was meant to die for His people?

In Isaiah 50, we find a prophetic depiction of Christ setting His face like flint to fulfill His mission of redemption. He knew what he was called to endure, describing His suffering in the first person—'I gave my back to the smiters.' This contrasts with the notion of a vague, universal atonement; instead, Scripture guides us to see that Jesus died specifically for His sheep, as noted in John 10:14-15, where He says He lays down His life for them. Therefore, the assurance of His sacrificial death is rooted in prophecy and the fulfillment of God's redemptive plan.