'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;

It is he who is the atoning sacrifice for our sins, and not for ours only, but also for the whole world's.

This is love: not that we have loved God, but that he loved us and sent his Son to be the atoning sacrifice for our sins.