'Law' in the Bible

And those of the sons of Levi who receive the priestly office have authorization according to the law to collect a tithe from the people, that is, from their fellow countrymen, although they too are descendants of Abraham.

So if perfection had in fact been possible through the Levitical priesthood -- for on that basis the people received the law -- what further need would there have been for another priest to arise, said to be in the order of Melchizedek and not in Aaron's order?

For when the priesthood changes, a change in the law must come as well.

for the law made nothing perfect. On the other hand a better hope is introduced, through which we draw near to God.

For the law appoints as high priests men subject to weakness, but the word of solemn affirmation that came after the law appoints a son made perfect forever.

Now if he were on earth, he would not be a priest, since there are already priests who offer the gifts prescribed by the law.

For when Moses had spoken every command to all the people according to the law, he took the blood of calves and goats with water and scarlet wool and hyssop and sprinkled both the book itself and all the people,

Indeed according to the law almost everything was purified with blood, and without the shedding of blood there is no forgiveness.

For the law possesses a shadow of the good things to come but not the reality itself, and is therefore completely unable, by the same sacrifices offered continually, year after year, to perfect those who come to worship.

When he says above, "Sacrifices and offerings and whole burnt offerings and sin-offerings you did not desire nor did you take delight in them" (which are offered according to the law),

Someone who rejected the law of Moses was put to death without mercy on the testimony of two or three witnesses.