Sayyiduna Awf al-Ansari al-Ashhali (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "O Allah, forgive the Ansar, the children of the Ansar, the children of the children of the Ansar, and the freed slaves (mawali) of the Ansar."
Al-Tabarani recorded it, and its chain contains narrators whom I do not know.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16533
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (81/18)»