كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
5
The Book of Mosques and Places of Prayer
(18)
Chapter: The prohibition of making lost property announcements in the masjid, and what should be said by one who hears a person making such an announcement
(18)
باب النَّهْىِ عَنْ نَشْدِ الضَّالَّةِ، فِي الْمَسْجدِ وَمَا يَقُولُهُ مَنْ سَمِعَ النَّاشِدَ ‏

Sulaiman b. Buraida narrated it on the authority of his father that a man cried out in the mosque saying:

Who had called out for the red camel? Upon this the Messenger of Allah (ﷺ) said: May it not be restored to you! The mosques are built for what they are meant.
وَحَدَّثَنِي حَجَّاجُ بْنُ الشَّاعِرِ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا الثَّوْرِيُّ، عَنْ عَلْقَمَةَ بْنِ مَرْثَدٍ، عَنْ سُلَيْمَانَ بْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، أَنَّ رَجُلاً، نَشَدَ فِي الْمَسْجِدِ فَقَالَ مَنْ دَعَا إِلَى الْجَمَلِ الأَحْمَرِ ‏.‏ فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ لاَ وَجَدْتَ ‏.‏ إِنَّمَا بُنِيَتِ الْمَسَاجِدُ لِمَا بُنِيَتْ لَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 569 a
In-book reference : Book 5, Hadith 100
USC-MSA web (English) reference : Book 4, Hadith 1155
  (deprecated numbering scheme)