Sahih Muslim · Hadith 4422

وحدثنا عبيد الله بن معاذ، حدثنا أبي، حدثنا شعبة، بهذا الإسناد قال ‏"‏ من أعتق شقيصا من مملوك فهو حر من ماله ‏"‏ ‏.‏

This hadith has been narrated on the authority of Shu'ba with the same chain of transmitters (and the words are): " He who emancipates a portion in a slave, he should (secure full) freedom for him from his property."

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