وَعَنْهُ قَالَ: قَالَ
رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«مَنْ سَمِعَ رَجُلاً يَنْشُدُ ضَالَّةً فِي اَلْمَسْجِدِ فَلْيَقُلْ: لَا رَدَّهَا اَللَّهُ عَلَيْكَ، فَإِنَّ اَلْمَسَاجِدَ لَمْ تُبْنَ لِهَذَا» رَوَاهُ مُسْلِمٌ 11 صحيح
The Messenger of Allah (sallallahu alayhi wa sallam) said: “Whoever hears a man crying out in the mosque about something he has lost, he should say, ‘May Allah not restore it to you’, for the mosques were not built for this.”.
Bulugh al-Maram 304, Book 2, The Book of Prayer, Hadith 125. 1 min read