The Book of Occultation — al-Ṭūsī · Hadith 516 (#Ḥadīth #2)
Chapter 40 | Reports of the Emissaries of Imam during the period of occultation
294- وقد روي في بعض الاخبار أنهم عليهم السلام قالوا: خدامنا وقوامنا شرار خلق الله.
H 294 - It is narrated in some reports that they said: “Our servants and our caretakers are the most evil of Allah’s creation.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).