I Corinthians 15:3
For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures.
I John 4:10
This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for our sins.
In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God’s grace that he lavished on us. With all wisdom and understanding, he made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, to be put into effect when the times reach their fulfillment—to bring unity to all things in heaven and on earth under Christ.