Mishkat al-Masabih
Abu Huraira reported God’s Messenger as saying, “A man must not offer a price above that offered by his brother Muslim.” Muslim transmitted it.
وَعَنْ أَبِي هُرَيْرَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَا يَسُمِ الرَّجُلُ على سَوْمِ أخيهِ الْمُسلم» . رَوَاهُ مُسلم
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