وَإِذَا كَالُوهُمْ أَو وَّزَنُوهُمْ يُخْسِرُونَ
Asad Quran Translation
but when they have to measure or weigh whatever they owe to others, give less than what is due!1
This passage (verses 1-3) does not, of course, refer only to commercial dealings but touches upon every aspect of social relations, both practical and moral, applying to every individual's rights and obligations no less than to his physical possessions.
Malik Quran Translation
but when they give by measure or by weight to others, they give less than due.
Yusuf Ali Quran Translation
But when they have to give by measure or weight to men give less than due.
Mustafa Khattab Quran Translation
but give less when they measure or weigh for buyers.
Piktal Quran Translation
But if they measure unto them or weigh for them, they cause them loss.
Waitha kaloohum aw wazanoohum yukhsiroona