وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ سَمِعَ رَجُلًا يَنْشُدُ ضَالَّةً فِي الْمَسْجِدِ فَلْيَقُلْ: لَا رَدَّهَا اللَّهُ عَلَيْكَ فَإِنَّ الْمَسَاجِد لم تبن لهَذَا»
The Messenger of Allah (sallallahu alayhi wa sallam) said:, “If anyone hears a man crying out in the mosque about something he has lost, he should say, ‘May God not restore it to you,’ for the mosques were not built for this.”