Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) states: Sayyidah Aishah (may Allah be pleased with her) was obliged to free a slave from among the descendants of Sayyiduna Isma'il (peace be upon him). Some captives belonging to Banu al-Anbar came, and the Prophet (peace and blessings be upon him) instructed Sayyidah Aishah (may Allah be pleased with her) to free one of them. The narrator says: Or the words were something with this meaning.
Al-Bazzar recorded it from his teacher Ahmad bin Abdullah bin Abi al-Safar, who is thiqah (trustworthy); the narrators of this report are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16567