Abu Hatim ibn Habban al-Busti: He was one of the most pious people of Basra, and he was a righteous jurist, a preserver, pious, and one who interprets dreams.
Abu Zar'ah al-Razi: Trustworthy
Abu Qilaba al-Basri: He mentioned him and said: 'Take him wherever you want, you will find him the most pious of you and the most in control of himself.'
Ahmad ibn Hanbal: One of the trustworthy
Ahmad ibn Salih al-Jili: A trustworthy Tabi'i, and he is one of the most knowledgeable people about Shuraih and 'Ubaidah, and he was educated by the Kufans, the companions of Abdullah.
Ibn Hajar al-Asqalani: Trustworthy, Upright, Devout, Great in Rank, Does not consider narration by meaning
Al-Khatib al-Baghdadi: Muhammad was one of the jurists of Basra and those known for their piety in his time
Al-Dhahabi: Trustworthy, Authoritative, one of the prominent figures, Great in knowledge
Amr ibn Shurahil al-Sha'bi: Upon you is that deaf man, meaning: Muhammad ibn Sirin
Abdullah ibn 'Aun al-Basri: He used to narrate the hadith by its letters, and once: 'His insight into knowledge is like the insight of the shrewd merchant into his trade.'
Awf al-A'rabi: I have not seen anyone more knowledgeable than him in trade, nor in judgment, nor in inheritance laws, nor in calculation.
Muhammad ibn Sa'd, the scribe of al-Waqidi: Trustworthy, Reliable, High-ranking, a leading jurist, very knowledgeable, pious, and he had deafness.
Muhammad ibn 'Awf al-Ta'i: Good knowledge of judgment, good knowledge of inheritance laws
Mawriq al-'Ijli: I have not seen anyone more knowledgeable in his piety than him.
Hisham ibn Hassan al-Qurashi: The most truthful person I have ever met, Muhammad ibn Sirin, told me
Yahya ibn Ma'in: Trustworthy, and in a narration by Ibn Mahriz: He never heard anything from 'Aisha at all, nor did he see her, and he did not hear from Ibn Abbas, nor did he hear from 'Ikrimah.