Musnad Ahmad 210

Translation

✧ Some food was brought to Umar b. al-Khattab, and he invited a man to it. The man said, 'I am fasting.' Then Umar said, 'What kind of fasting are you observing? If it were not disliked for me to add or omit, I would narrate to you the hadith of the Prophet ﷺ when the bedouin brought him a hare. But send for Ammar.' When Ammar came, he said, 'Were you present with the Messenger of Allah ﷺ on the day the bedouin brought him the hare?' He said, 'Yes.' He said, 'I said, "I saw blood on it." He said, "Eat it." He said, "I am fasting." He said, "What kind of fasting are you observing?" He said, "The first of the month and the last of it." He said, "If you are fasting, then fast the thirteenth, fourteenth, and fifteenth."'

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