Siyyid Muhammad Isfahani gave a bad time to Baha'u'llah

Every one of this people well knoweth that Siyyid Muhammad was but one of Our servants. In the days when, as requested by the Imperial Ottoman Government, We proceeded to their Capital he accompanied Us. Subsequently, he committed that which - I swear by God - hath caused the Pen of the Most High to weep and His Tablet to groan. We, therefore, cast him out; whereupon, he joined Mirza Yahya, and did what no tyrant hath ever done. We abandoned him, and said unto him: "Begone, O heedless one!" After these words had been uttered, he joined the order of the Mawlavis, and remained in their company until the time when We were summoned to depart.

http://reference.bahai.org/en/t/b/ESW/esw-9.html