'Sin offerings' in the Bible

For every high priest who is taken from men is appointed to officiate on behalf of men in matters relating to God, that is, to offer gifts and sin-offerings.

and so is obliged to offer sin-offerings, not only for the people but for himself as well.

"Sacrifice and offering you did not wish, but a body you have prepared for me; in burnt-offerings and sin-offerings you never took delight.

Although at first He said, "You never wished or took delight in sacrifices and offerings, burnt-offerings and sin-offerings" -- all of which are repeatedly offered in accordance with the law --