Abdullah bin Umar reported the Messenger of Allah ﷺ as saying: If anyone emancipates a slave who has property, the property of the slave belongs to him except that the master makes a stipulation.
Hadith Referenceسنن ابي داود / كتاب العتق / 3962
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده صحيح، صحيح بخاري (2379), مشكوة المصابيح (3396، 3405), وأخرجه ابن ماجه (2529 وسنده صحيح)