'Mouth' in the Bible

He humbled you, causing you to be hungry, yet he fed you with manna that neither you nor your ancestors had known, in order to teach you that human beings are not to live by food alone instead human beings are to live by every word that proceeds from the mouth of the LORD.

I will raise up a prophet like you from among their relatives, and I will place my words in his mouth so that he may expound everything that I have commanded to them.

No, the word is very near you it's within your mouth and heart for you to attain."

Hear, heavens, and I will speak! Listen, earth, to the words of my mouth!