'Sin offering' in the Bible

But the flesh of the bullock, and its skin, and it dung, thou shall burn with fire outside the camp. It is a sin-offering.

And every day thou shall offer the bullock of sin-offering for atonement. And thou shall cleanse the altar when thou make atonement for it, and thou shall anoint it, to sanctify it.

And Aaron shall make atonement upon the horns of it once in the year, with the blood of the sin-offering of atonement. Once in the year he shall make atonement for it throughout your generations. It is most holy to LORD.