Muwatta Malik, Book 31, Hadith 1299 (In-Book)

Yahya related to me from Malik from Ibn Shihab that Abdullah ibn Amir gave Uthman ibn Affan a slave-girl who had a husband whom he had purchased at Basra. Uthman said, "I will not go near her until her husband separates from her." Ibn Amir compensated the husband and he separated from her.

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عَامِرٍ، أَهْدَى لِعُثْمَانَ بْنِ عَفَّانَ جَارِيَةً وَلَهَا زَوْجٌ ابْتَاعَهَا بِالْبَصْرَةِ فَقَالَ عُثْمَانُ لاَ أَقْرَبُهَا حَتَّى يُفَارِقَهَا زَوْجُهَا ‏.‏ فَأَرْضَى ابْنُ عَامِرٍ زَوْجَهَا فَفَارَقَهَا ‏.‏

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also referenced under: Book 31, Hadith 7 (USC-MSA)