'Gifts and Sacrifices' in the Bible

FOR, every high-priest taken from among men, is constituted on behalf of men for those services which relate to God, that he should offer both gifts and sacrifices for sins:

For every high-priest is appointed to offer both gifts and sacrifices: wherefore it is necessary that this person also have somewhat to offer.

which figurative representation [continues] unto the present time, according to which both gifts and sacrifices are offered, which cannot, with respect to conscience, make him perfect who performs the services,