Hadith 5:622
Hafs narrated to us, from Ash'ath ibn Siwar, who said: Al-Hasan was asked about a man who bought his father with [money from] Zakat and then freed him. He said: "He bought the best of necks [slaves]."
حدثنا حفص عن أشعث بن سوار قال سئل الحسن عن رجل اشترى أباه من الزكاة فاعتقه قال اشترى خير الرقاب