Sayyiduna Atiyyah bin Sufyan al-Thaqafi (may Allah be pleased with him) said: A delegation of Thaqif came to the Messenger of Allah (peace and blessings be upon him) in Ramadan, and he (peace and blessings be upon him) had a tent pitched for them in the mosque. When they became Muslims, they fasted with him (peace and blessings be upon him).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14520