Sahih Muslim · Hadith 2705

وحدثنا زهير بن حرب، وعثمان بن أبي شيبة، قالا حدثنا جرير، عن الأعمش، بهذا الإسناد وقالا فلما نزل رمضان تركه ‏.‏

This hadith has been narrated from Jarir on the authority of A'mash with the same chain of transmitters and he said (these words with a little bit of variation from the previous hadith): When (fasting) in Ramadan was (made) obligatory, he aban- doned it (the practice of observing fast on Ashura).

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).