Shaykhul-Islām Ibn Taymiyyah رحمه الله stated:
Do not aid/support an individual with unrestricted aid/support other than the Messenger of Allāh ﷺ. Do not aid/support a group with unrestricted aid/support except for the Companions رضي الله عنهم أجمعين. For indeed the guidance goes with the Messenger wherever he goes. And it goes with his Companions wherever they go, excluding the companions of other than him. When they agree (upon a matter), they never agree upon a mistake - different from the companions of a scholar from the scholars. Indeed it is possible for them to unite upon a mistake. Rather every statement that they say that other than them from the Ummah did not say is nothing but a mistake. For indeed the religion which Allāh sent His Messenger with is not subjected to one scholar and his companions. If the matter was such, then that individual would be equal to the Messenger of Allāh ﷺ. And (this statement) is similar to the statement of the Rāfidah about the Infallible Imām.