He said to him, "Umayr, I have freed you with a pleasant emancipation. I heard the Messenger of Allah ﷺ say, 'Whoever frees a slave without specifying his property, the property belongs to him.' So tell me, what is your property?"Muhammad bin Abdullah bin Numayr narrated to us, Muttalib bin Ziyad narrated to us, from Ishaq bin Ibrahim, who said, Abdullah bin Masud said to my grandfather, and he mentioned something similar.
حدثنا محمد بن يحيى حدثنا سعيد بن محمد الجرمي حدثنا المطلب بن زياد عن إسحق بن إبراهيم عن جده عمير وهو مولى ابن مسعود أن
له يا عمير إني أعتقتك عتقا هنيئا إني سمعت رسول الله ﷺ يقول أيما رجل أعتق غلاما ولم يسم ماله فالمال له فأخبرني ما مالك حدثنا محمد بن عبد الله بن نمير حدثنا المطلب بن زياد عن إسحق بن إبراهيم قال قال عبد الله بن مسعود لجدي فذكر نحوه
No references are available.
[Its chain of transmission is daif]. Ishaq bin Ibrahim bin Umayr and his grandfather are both unknown, as stated in al-Taqrib. No one deemed them reliable except Ibn Hibban, and Maslamah's certification of reliability counts for nothing, since Maslamah himself is impugned. As for the first of them, Ibn Jarud and others graded him daif.