Ibn ʿAdī said, “There is no harm in him or in his narrations. He relates a large body of hadith and many singular reports. I copied his Musnad from al-Qāsim ibn ʿAbd Allāh—who had taken it from him—and he had arranged it by topical chapters. It contains unusual reports, variant versions, uncommon traditions, and transmissions from the scholars of Medina, men from whom no one else relates.”

Zakariyyā ibn Yaḥyā al-Ḥulwānī said, “I saw Abū Dāwūd al-Sijistānī using the hadiths of Yaʿqūb ibn Kāsib as filler sheets on the backs of his books (1). I asked him about that, and he replied, ‘When we examined his Musnad we came across hadiths we regarded as objectionable. We demanded to see the original copies; he put us off, but later brought them out. We found that the hadiths in the originals had been altered in a fresh hand: they had formerly been mursal reports, but he had supplied full chains for them and added material to them (2).’ ”

Al-ʿUqaylī heard this story from Zakariyyā.

[Al-ʿUqaylī further relates:] “Al-Firyābī narrated to us: Yaʿqūb ibn Ḥumayd narrated to us: Ḥātim ibn Ismāʿīl, from al-Nuʿmān ibn Thābit, from Yaʿlā ibn ʿAṭāʾ, from ʿUmārah ibn Ḥadīd, from Sakhr al-Ghāmidī, who reported that the Prophet ﷺ said, ‘O Allah, bless my community in its early mornings.’ (3)”