How do we know Christ's redemptive work was planned before time?

The Bible confirms that Christ's redemptive work was predetermined before the foundation of the world. In Revelation 13:8, Jesus is referred to as the Lamb slain from the foundation of the world, indicating that His atoning sacrifice was foreordained by God. Additionally, Ephesians 1:4 states that believers were chosen in Christ before the foundation of the world, highlighting the eternal plan of God for redemption. This underscores the reality of God's sovereignty and the certainty of His redemptive plan.