From Sahih Muslim (Hadith 2010):
Adi b. Hatim reported:that a person recited a sermon before the Messenger of Allah (ﷺ) thus: He who obeys Allah and His Apostle, he in fact follows the right path, and he who disobeys both of them, he goes astray. Upon this the Messenger of Allah (ﷺ) said: What a bad speaker you are; say: He who disobeys Allah and His Apostle. Ibn Numair added: He in fact went astray
Reference: Muslim 2010