'Atoning' in the Bible

whom God set forth to be an atoning sacrifice, through faith in his blood, for a demonstration of his righteousness through the passing over of prior sins, in God's forbearance;

And he is the atoning sacrifice for our sins, and not for ours only, but also for the whole world.

In this is love, not that we loved God, but that he loved us, and sent his Son as the atoning sacrifice for our sins.