'According to the Law' in the Bible

They stood in their place after their order, according to the law of Moses the man of God: the priests sprinkled the blood [which they received] of the hand of the Levites.

Because you are sent of the king and his seven counselors, to inquire concerning Judah and Jerusalem, according to the law of your God which is in your hand,

Now therefore let us make a covenant with our God to put away all the wives, and such as are born of them, according to the counsel of my lord, and of those who tremble at the commandment of our God. Let it be done according to the law.

Now, O king, establish the decree, and sign the writing, that it not be changed, according to the law of the Medes and Persians, which doesn't alter.

Then they came near, and spoke before the king concerning the king's decree: Haven't you signed an decree, that every man who shall make petition to any god or man within thirty days, except to you, O king, shall be cast into the den of lions? The king answered, The thing is true, according to the law of the Medes and Persians, which doesn't alter.