'Propitiation for Our Sins' in the Bible

My beloved children, I write these things to you, that ye may not sin. But if any one sin, we have an advocate with the Father, Jesus Christ, the righteous, And he is the propitiation for our sins;

And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.

Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.