'Guilt offering' in the Bible

and he hath separated to Jehovah the days of his separation, and he hath brought in a lamb, a son of a year, for a guilt-offering, and the former days are fallen, for his separation hath been defiled.

This is thine of the most holy things, from the fire: all their offering, to all their present, and to all their sin-offering, and to all their guilt-offering, which they give back to Me, is most holy to thee, and to thy sons;