And Abu Kamil al-Jahdari narrated to us, 'Abd al-'Aziz ibn al-Mukhtar narrated to us, 'Amr ibn Yahya narrated to us, from his father, from Abu Sa'id al-Khudri — may Allah be pleased with him — that the Messenger of Allah, peace and blessings be upon him, forbade fasting on two days: the day of Fitr (the day of breaking the fast) and the day of Nahr (the day of sacrifice).