Ibn Buraydah (may Allah have mercy on him) narrates from his father (Sayyiduna Buraydah, may Allah be pleased with him) that the Prophet (peace and blessings be upon him) heard a Bedouin, or some man, saying: Who will bring the red camel? The Messenger of Allah (peace and blessings be upon him) said: "May you not find it! These mosques are only for the purpose for which they were built," meaning for worship.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللقطة / 12105