Majma al-Zawaid 16530 — Reports on the virtue of the Ansar

Sayyiduna Rifa'ah bin Rafi' (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 their neighbours."
Al-Bazzar and al-Tabarani recorded it, and the narrators of both are the narrators of the Sahih except Hisham bin Harun, who is thiqah (trustworthy).