'Mouth of God' in the Bible

He humbled you, and allowed you to be hungry, and fed you with manna, which you did not know, neither did your fathers know; that he might make you know that man does not live by bread alone, but man lives by everything that proceeds out of the mouth of God shall man live.

Nevertheless Josiah would not turn his face from him, but disguised himself, that he might fight with him, and hearkened not unto the words of Necho from the mouth of God, and came to fight in the valley of Megiddo.

He shall never come out of darkness, the flame shall dry up his branches, with the blast of the mouth of God shall he be taken away.

But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God.