The Messenger of Allah (ﷺ) prohibited buying and selling in the mosque, announcing aloud about a lost thing, the recitation of a poem in it, and prohibited sitting in a circle (in the mosque) on Friday before the prayer.
Reference: Sunan Abi Dawud 1079 In-book : Book 2, Hadith 690 English translation : Book 3, Hadith 1074
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