Reference: as-Siyar – Volume 16, Page 54
al-Imaam al-Haakim رحمه الله said about his Shaykh, al-Haafidth Abee ‘Alee an-Neesaabooree رحمه الله:
I do not say this as a dedicated fanatic since he was my teacher, but I simply never saw anything comparable to him.
