—the book of Qabīṣa or the book of al-Firyābī?’
He answered, ‘The book of al-Firyābī.’ (1)

ʿAbbās narrated from Yaḥyā that he said, “Qabīṣa, Yaḥyā ibn Ādam, Abū Aḥmad al-Zubayrī, and al-Firyābī—in their reports from Sufyān—are all virtually on the same level.” (2)

ʿUthmān al-Dārimī said, “I asked Ibn Maʿīn, ‘How is al-Firyābī in his transmission from Sufyān?’
He replied, ‘He is like the rest of them,’—meaning ʿUbayd Allāh ibn Mūsā, Qabīṣa, and ʿAbd al-Razzāq.” (3)

Al-ʿIjlī said, “Al-Firyābī is trustworthy.”

Al-Bukhārī—according to what al-Dūlābī relates from him—said, “Muḥammad ibn Yūsuf narrated to us—he was among the finest people of his time—from Sufyān, a ḥadīth…,” which he then mentioned.

Al-Nasāʾī declared him “trustworthy.”

Abū Zurʿah said, “Al-Firyābī is dearer to me than Yaḥyā ibn Yamān.”

Abū Ḥātim said, “Reliable, truthful.” (4)

Al-Dāraquṭnī was asked about him; he deemed him reliable and, on account of his virtue and devotion, preferred him to Qabīṣa.

Ibn Zanjūyah said, “I have never seen anyone more scrupulous than al-Firyābī.”

Ibrāhīm ibn Abī Ṭālib reported: I heard Muḥammad ibn Sahl ibn ʿAskar say, “We went out with Muḥammad ibn Yūsuf al-Firyābī to perform the rain-prayer. He raised his hands, and he had not lowered them before rain began to fall.” (5)