Abu Sa'd al-Sam'ani: He mentioned him in al-Ansab
Abu Abd Allah al-Hakim al-Naysaburi: One of the notables of the poor and ascetics, and one of the practitioners of Sufism, his certificates of study were lost from Ibrahim ibn Muhammad ibn Sufyan al-Faqih, so he copied some from a copy he did not have a certificate for, and once: from the great Sufis, and he has a certificate of study of Sahih Muslim
Al-Dhahabi: Trustworthy, and once: narrator of Sahih Muslim, he heard from a group and did not travel, and once: the imam, the ascetic, the exemplary, the truthful