Sayyiduna Zubayb bin Tha'labah (may Allah be pleased with him) states: I heard the Prophet (peace and blessings be upon him) say: "Whoever is obliged to free a slave from among the descendants of Sayyiduna Isma'il (peace be upon him) should free someone from Banu al-Anbar."
Al-Tabarani recorded it; its chain contains a narrator Abdullah bin Zubayb, as it appears in the original, but he is actually Abdullah in the non-diminutive form, as Ibn Abi Hatim mentioned him, and Ibn Hibban mentioned him among the trustworthy Tabi'in. The remaining narrators of this report are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16568
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (5298) ، أخرجه المعجم الكبير للطبراني برقم: 5298، وأخرجه شرح مشكل الآثار برقم: 3911»