John 12:48-50

48Whoever rejects Me and refuses to accept My teachings, has one who judges him; the very word that I spoke will judge and condemn him on the last day.

49For I have never spoken on My own initiative or authority, but the Father Himself who sent Me has given Me a commandment regarding what to say and what to speak.

50I know that His commandment is eternal life. So the things I speak, I speak [in accordance with His exact instruction,] just as the Father has told Me.”