Riyad as-Salihin

Riyad as-Salihin 1696

Undesirability of Quarrelling or Raising voices in the Mosque
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Riyad as-Salihin 1696
Arabic hadith text
عن أبي هريرة رضي الله عنه أنه سمع رسول الله صلى الله عليه وسلم يقول‏:‏ ‏"‏من سمع رجلا ينشد ضالة في المسجد فليقل‏:‏ لا ردها الله عليك، فإن المساجد لم تبنَ لهذا‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏
Translation
Abu Hurairah (May Allah be pleased with him) said

The Messenger of Allah (ﷺ) said, "If anyone hears a man inquiring in the mosque about something he has lost, he should say: 'La raddaha Allahu 'alaika (May Allah not restore it to you),' for mosques are not built for this purpose."[Muslim]