صحیح ابن حبان
Ibn Hibban
كتاب الصلاة
Book of Prayer
باب المساجد - ذكر الزجر عن البيع والشراء في المساجد إذ البيع لا يكاد يخلو من الرفث فيه
Chapter on Mosques - Prohibition of buying and selling in mosques as it often involves inappropriate speech.
1 hadith
Hadith 1650
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "When you see someone buying and selling in the mosque, say: May Allah not grant profit in your trade."