Hazrat Sila bin Zufar narrates that we were with Sayyiduna Ammar (may Allah be pleased with him) when a roasted goat was brought to him. He said, "Eat." Some people held back. One of them said, "I am fasting." So Sayyiduna Ammar (may Allah be pleased with him) said, "Whoever fasts on the day of doubt has disobeyed Abul Qasim (peace and blessings be upon him)."