'According to the Law' in the Bible

Because thou art sent by the king, and by his seven counsellors, to inquire concerning Judah and Jerusalem, according to the law of thy God which is in thy hand;

And now 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 that tremble at the commandments of our God; and let it be done according to the law.