Hadith 4:625
Waki’ narrated to us, from Sufyan, from ‘Abd al-‘Aziz ibn Hakim, who said: I heard Ibn ‘Umar say: If I were to fast the entire year, I would break my fast on the day about which there is doubt.
حدثنا وكيع عن سفيان عن عبد العزيز بن حكيم قال سمعت بن عمر لو صمت السنة كلها لأفطرت اليوم الذي يشك فيه