'In My Name' in the Bible

I will personally hold responsible anyone who then pays no attention to the words that prophet speaks in my name.

"But if any prophet presumes to speak anything in my name that I have not authorized him to speak, or speaks in the name of other gods, that prophet must die.

whenever a prophet speaks in my name and the prediction is not fulfilled, then I have not spoken it; the prophet has presumed to speak it, so you need not fear him."