1 Peter 1:20

2 Timothy 1:9-10 NIV
He has saved us and called us to a holy life—not because of anything we have done but because of his own purpose and grace. This grace was given us in Christ Jesus before the beginning of time, but it has now been revealed through the appearing of our Savior, Christ Jesus, who has destroyed death and has brought life and immortality to light through the gospel.

Ephesians 1:4 NIV
For he chose us in him before the creation of the world to be holy and blameless in his sight. In love

Hebrews 9:26 NIV
Otherwise Christ would have had to suffer many times since the creation of the world. But he has appeared once for all at the culmination of the ages to do away with sin by the sacrifice of himself.