Musannaf Ibn Abi Shayba 13:1781

Abu Bakr narrated to us, he said: Sufyan ibn ‘Uyaynah narrated to us, from Ibn Abi Layla, from Isma’il ibn Raja’, from Abu Mijlaz, that there was a slave who was between two men, and one of them emancipated his share. He said: The Prophet, may Allah bless him and grant him peace, detained him until he sold a young slave girl of his for it.