Allah never sent any prophet nor did He invest anyone with authority except that he has two entourages: one entourage enjoins him to do good and encourages him to carry it out; another entourage enjoins him to do evil and incites him to carry it out.
Authentic hadithعن أبي سعيد الخدري وأبي هريرة رضي الله عنهما مرفوعاً: "ما بعث الله من نبي ولا اسْتَخْلَفَ من خليفة إلا كانت له بطانتان: بطانة تأمره بالمعروف وتَحُضُّهُ عليه، وبطانة تأمره بالشر وتَحُضُّهُ عليه، والمعصوم من عصم الله".
Abu Sa‘īd al-Khudri and Abu Hurayrah (may Allah be pleased with both of them) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Allah never sent any prophet nor did He invest anyone with authority except that he has two entourages: one entourage enjoins him to do good and encourages him to carry it out; another entourage enjoins him to do evil and incites him to carry it out. Saved is the one whom Allah protects.''
Explanation
The Prophet (may Allah's peace and blessings be upon him) informs that Allah did not send any prophet, nor gave anyone authority, except the prophet or sovereign has two entourages. One commands him with good and the other commands him with evil. The one who is saved from the negative influences of an evil entourage is the one whom Allah protects.
Source · Narrated by Bukhari
From the Hadith Encyclopedia (hadeethenc.com).