Abu Ishaq reported on the authority of Silah: We were with Ammar on the day when the appearance of the moon was doubtful. (The meat of) goat was brought to him. Some people kept aloof from (eating) it. Ammar said: He who keeps fast on this day disobeys Abu lQasim (i.e. the Prophet) (ﷺ).
Reference: Sunan Abi Dawud 2334 In-book : Book 14, Hadith 22 English translation : Book 13, Hadith 2327
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