Atiyyah bin Sufyan bin Abdullah (may Allah be pleased with him) narrates: The delegation of the Thaqif tribe came to the Prophet (peace and blessings be upon him) in Ramadan, and he had a tent pitched for them in the mosque. When they accepted Islam, they also fasted with him.
Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Muhammad bin Ishaq, who is a mudallis, and he narrated it with 'an'anah.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2067