Sunan an-Nasa'i 4201
سنن النسائي#4201SahihIt was narrated that Abu Hurairah said " The Messenger of Allah said:'No ruler is appointed but he has tow groups of advisers: A group which urges him to do good and tells him not to do evil, and a group which does its best to corrupt him. Whoever is protected from their evil is indeed protected. And he (the ruler) belongs to the group that has the greater influence over him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 39:53