Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Disowning one's lineage is disbelief, however slight that lineage may be, and claiming a lineage that is not known (is also disbelief)."
Imam Ahmad and al-Tabarani (in al-Mu'jam al-Saghir and al-Mu'jam al-Awsat) recorded it; however, he reported these words: "It is disbelief on a man's part."
This narration was reported by Amr bin Shu'ayb from his father, from his grandfather.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الإيمان / 348
Hadith Gradingمحدثین:إسناده حسن۔
Hadith Takhrij«اخرجه الامام احمد فى مسنده 215/2 اخرجه الامام الطبراني فى معجمه الاوسط 2818 اخرجه الامام الطبراني فى معجمه الصغير 108/1 اورده المؤلف فى زوائد المستد 136 ، أخرجه مسند أحمد برقم: 6980، وأخرجه المعجم الأوسط للطبراني برقم: 7915، وأخرجه المعجم الصغير للطبراني برقم: 1028»