Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah said, "When you see someone buying or selling in the mosque, say to him: 'La arbaha-Allahu tijarataka (May Allah not make your bargain profitable)!' When you see someone announcing something lost in it, say: 'May Allah not restore it to you!"'[At-Tirmidhi].

Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah said, "When you see someone buying or selling in the mosque, say to him: 'La arbaha-Allahu tijarataka (May Allah not make your bargain profitable)!' When you see someone announcing something lost in it, say: 'May Allah not restore it to you!"'[At-Tirmidhi].

وعنه أن رسول الله صلى الله عليه وسلم قال‏:‏ ‏ "‏إذا رأيتم من يبيع أو يبتاع في المسجد، فقولوا‏:‏ لا أربح الله تجارتك، وإذا رأيتم من ينشد ضالة فقولوا‏:‏ لا ردها الله عليك‏"‏‏.‏