1402. hadíth
وَ قَالَ عَلَيْهِ اَلسَّلاَمُ: "إِذَا قَالَ اَلرَّجُلُ لِلرَّجُلِ هَلُمَّ أَحْسِنْ بَيْعَكَ فَقَدْ حَرُمَ عَلَيْهِ اَلرِّبْحُ ".
Imam (a.s) said: "If a man says to another man, 'Come, I will improve your sale,' then it is forbidden for him to make a profit."