Abu Hatim al-Razi: He was a Companion
Abu Nasr ibn Makula: He was a Companion and narrated from the Prophet, peace and blessings be upon him
Ibn Hajar al-'Asqalani: Companion
al-Mizzi: He is counted among the Companions
Muhammad ibn Isma'il al-Bukhari: He heard the Prophet, peace and blessings be upon him