Hadith #789The Book on Fasting · Narrated by Aisha bint Abi Bakr, Ayoub bin Waqd al-Kwfy أيوب بن واقد الكوفي, Bashr bin Mua'dh al-Qdy بشر بن معاذ العقدي, Hisham bin 'Urwa هشام بن عروة, Urwa ibn al-Zubayr عروة بن الزبير
The Messenger of Allah said: “Whoever stays with a people, then he is not to fast without their permission.”