Sunan Abi Da'ud · Hadith 4007
Dialects and Readings of the Qur'an (Kitab Al-Huruf Wa Al-Qira'at) - كتاب الحروف والقراءات
حدثنا جعفر بن مسافر، حدثنا ابن أبي فديك، عن هشام بن سعد، بإسناده مثله .
The tradition mentioned above has also been transmitted by Hisham b. Sa'd with a different chain of narrators in a similar way.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).