Sunan Ibn Majah - سنن ابن ماجه
4. The Book On The Mosques And The Congregations - كتاب المساجد والجماعات
11) Chapter: Prohibition Of Making Lost-and-Found Announcements In The Mosque
It was narrated from Sulaiman bin Burdah that his father said:
"The Messenger of Allah performed prayer, then a man said: 'Who was looking for the red camel?' The Prophet said: 'May you not find it! The mosques were built for that for which they were built.'"
11) باب النَّهْىِ عَنْ إِنْشَادِ الضَّوَالِّ، فِي الْمَسْجِدِ
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ أَبِي سِنَانٍ، سَعِيدِ بْنِ سِنَانٍ عَنْ عَلْقَمَةَ بْنِ مَرْثَدٍ، عَنْ سُلَيْمَانَ بْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ صَلَّى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فَقَالَ رَجُلٌ مَنْ دَعَا إِلَى الْجَمَلِ الأَحْمَرِ فَقَالَ النَّبِيُّ ـ صلى الله عليه وسلم ـ . " لاَ وَجَدْتَهُ إِنَّمَا بُنِيَتِ الْمَسَاجِدُ لِمَا بُنِيَتْ لَهُ "