'Word of the Lord' in the Bible

Now these are the generations of Aaron and Moses, in the day when the word of the Lord came to Moses on Mount Sinai.

Say to the children of Israel, If a man or a woman does any of the sins of men, going against the word of the Lord, and is in the wrong;

At the word of the Lord they put up their tents, and at the word of the Lord they went forward on their journey: they kept the orders of the Lord as he gave them by Moses.

Because he had no respect for the word of the Lord, and did not keep his law, that man will be cut off without mercy and his sin will be on him.