Ja'far bin Mutlib, who was among the group of Hazrat Amr bin Al-Aas (may Allah be pleased with him), invited a Bedouin to eat. This incident took place on the eleventh of Dhul-Hijjah. The Bedouin replied that he was fasting. Ja'far told him that once, on this same day, Hazrat Amr bin Al-Aas (may Allah be pleased with him) had also invited a man to eat, and he had given the same reply, that he was fasting. So Hazrat Amr (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) had forbidden fasting on this day.