Hadith 1355B7

. قَالَ مَالِكٌ : وَذَلِكَ أَنَّكَ تَشْتَرِي الْحِنْطَةَ بِالْوَرِقِ جِزَافًا، وَالتَّمْرَ بِالذَّهَبِ جِزَافًا فَهَذَا حَلَالٌ لَا بَأْسَ بِهِ. ¤
Imam Malik, may Allah have mercy on him, said: Exchanging one loaf of bread for two loaves, or exchanging a large loaf for a small loaf, is not good. However, if he considers the bread equal to the other bread, then the exchange is permissible even if he does not weigh it.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب البيوع / 1355B7
Hadith Takhrij «فواد عبدالباقي نمبر: 31 - كِتَابُ الْبُيُوعِ-ح: 52»