Abu Salamah bin Abd al-Rahman (may Allah have mercy on him) said that Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) bought a slave girl from Asim bin Adi (may Allah be pleased with him). She had a husband, so he returned her.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10749