Sunan an-Nasa'i, Volume 4, Book 27, Hadith 3482 (DarusSalam) ⓘ
It was narrated that 'Aishah, may Allah be pleased with her, said: "The husband of Barirah was a slave."
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا الْمُغِيرَةُ بْنُ سَلَمَةَ، قَالَ حَدَّثَنَا وُهَيْبٌ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ، عَنْ يَزِيدَ بْنِ رُومَانَ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، رضى الله عنها قَالَتْ كَانَ زَوْجُ بَرِيرَةَ عَبْدًا .
also referenced under: Hadith 3452 (Reference) & Book 27, Hadith 64 (In-Book)