Sahih Muslim · Hadith 4300
The Book of Bequests - كتاب الوصية
وحدثني محمد بن المثنى، وابن، بشار قالا حدثنا محمد بن جعفر، حدثنا شعبة، عن سماك، بهذا الإسناد نحوه . ولم يذكر فكان بعد الثلث جائزا .
This hadith has been narrated on the authority of Simak with the same chain of transmitters. But he did not mention: " It was then that one-third became permissible."
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).