'Law of the Lord' in the Bible

Therefore like as fire licketh up the straw, and as the flame consumeth the stubble: Even so - when their root is full - their blossom shall vanish away like dust or smoke. For they have cast away the law of the LORD of Hosts, and blaspheme the word of the holy maker of Israel.

For it is an obstinate people, unfaithful children, children that will not hear the law of the LORD.