'Command of the Lord' in the Bible

and the prophet cried out to the man of God who had come from Judah, “This is what the Lord says: ‘Because you rebelled against the command of the Lord and did not keep the command that the Lord your God commanded you—

When the prophet who had brought him back from his way heard about it, he said, “He is the man of God who disobeyed the command of the Lord. The Lord has given him to the lion, and it has mauled and killed him, according to the word of the Lord that He spoke to him.”

Now a certain man of the sons of the prophets said to another by the word of the Lord, “Please strike me.” But the man refused to strike him.