Abu Hatim al-Razi: He is a Sahabi (Companion of the Prophet).
Abu Hatim ibn Hibban al-Busti: He is a Sahabi.
Ibn Hajar al-Asqalani: Sahabi.
al-Mizzi: He is a Sahabi.
Muhammad ibn Ismail al-Bukhari: He is a Sahabi.
Authors of Tahrir Taqrib al-Tahdhib: How can his companionship be authentic and proven solely based on the narration of his son, Abu al-Haytham, who is also unknown?