'Sin offering' in the Bible

But the meat of the bull, its hide, and the contents of its intestines you shall burn in the fire outside the camp; it is a sin offering.

You shall offer a bull every day as a sin offering for atonement. You shall cleanse the altar from sin when you make atonement for it, and you shall anoint it to consecrate it [for God’s sacred purpose].

Once a year Aaron shall make atonement [for sin] on its horns. He shall make atonement on it with the blood of the sin offering of atonement once a year throughout your generations. It is most holy to the Lord.”