al-Ahsai received divine knowledge from the Imam al-Hasan

In modern times, the Shaykhis, an offshoot of the Twelver Shiites, maintain an extreme belief in the infallible fourteen. The Shaykhis derive their name from Shaykh Ahmad al-Ahsai (d. 1830), who taught that the infallible fourteen are the cause of the universe, in whose hands are life and death and the livelihood of men. Al-Ahsai seems to justify this belief by explaining that God is too transcendent to operate the universe personally, and therefore deputized the infallible fourteen to operate the universe on His behalf Al-Ahsai further maintains that when a believer has achieved a high degree of purity and righteousness, he will be able to receive from these fourteen divine knowledge through sufic trances or dreams. He claims that he personally received divine knowledge from the fourteen, especially from the Imam al-Hasan. Al-Ahsai relates that once he saw al-Hasan in a dream and asked him some esoteric questions. Al-Hasan placed his mouth on that of al-Ahsai and emitted into it saliva which tasted sweet, like honey. Thus, al-Ahsai received divine knowledge from the Imam al-Hasan.

Ref. : Extremist Shiites - The Ghulat Sects by Matti Moosa
https://archive.org/details/Moosa1988GhulatBeliefs_201712

Ghulat : A Shi'i term for theological extremists who go beyond what is considered reasonable in what they claim about the Prophet and Imams. The Shaykhis and Babis fall into this category. (Denis MacEoin)