'According to the Law' in the Bible

Now indeed those of the sons of Levi who receive the priesthood have commandment to collect tithes from the people according to the law, that is, of their brothers, although having come out of the loins of Abraham.

For certainly if he were on earth, he would not even be a priest, there being the priests who offer the gifts according to the law,

And almost all things, according to the law, are cleansed with blood, and remission does not occur without bloodshed.

saying above, Sacrifice and offering and whole burnt offerings and for sin thou did not desire, nor were thou pleased with things that are offered according to the law.