Hadith 8:2294
Abu Bakr narrated to us, he said: Hushaym narrated to us, from Mughira, from Ibrahim, who said: Ibn Umar was asked about a man who emancipates his slave woman and then marries her. He said: "He is like one who rides his sacrificial animal."
حدثنا أبو بكر قال حدثنا هشيم عن مغيرة عن إبراهيم قال سئل بن عمر عن الرجل يعتق أمته ثم يتزوجها قال هو كالراكب بدنته