'Sin offering' in the Bible

But the flesh of the ox and his skin and his dung, shalt thou burn with fire, without the host. For it is a sin offering.

and offer every day an ox for a sin offering for to reconcile with all. And thou shalt hallow the altar when thou reconcilest it, and shalt anoint it to sanctify it.

And Aaron shall reconcile his horns once in a year, with the blood of the sin offering of reconciling: even once in the year shall he reconcile it through your generations. And so is it most holy unto the LORD."