'According to the Law' in the Bible

“This is the law of the Nazirite who vows his offering to the Lord according to his separation, in addition to what else he can afford; according to his vow which he takes, so he shall do according to the law of his separation.”

They stood at their stations after their custom, according to the law of Moses the man of God; the priests sprinkled the blood which they received from the hand of the Levites.

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

So now let us make a covenant with our God to put away all the wives and their children, according to the counsel of my lord and of those who tremble at the commandment of our God; and let it be done according to the law.

The drinking was done according to the law, there was no compulsion, for so the king had given orders to each official of his household that he should do according to the desires of each person.

“Go, assemble all the Jews who are found in Susa, and fast for me; do not eat or drink for three days, night or day. I and my maidens also will fast in the same way. And thus I will go in to the king, which is not according to the law; and if I perish, I perish.”

Now, O king, establish the injunction and sign the document so that it may not be changed, according to the law of the Medes and Persians, which may not be revoked.”

Then they approached and spoke before the king about the king’s injunction, “Did you not sign an injunction that any man who makes a petition to any god or man besides you, O king, for thirty days, is to be cast into the lions’ den?” The king replied, “The statement is true, according to the law of the Medes and Persians, which may not be revoked.”