betrayal of trust

وَإِذْ أَخَذَ ٱللَّهُ مِيثَـٰقَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَـٰبَ لَتُبَيِّنُنَّهُۥ لِلنَّاسِ وَلَا تَكْتُمُونَهُۥ فَنَبَذُوهُ وَرَآءَ ظُهُورِهِمْ وَٱشْتَرَوْا۟ بِهِۦ ثَمَنًا قَلِيلًا ۖ فَبِئْسَ مَا يَشْتَرُونَ

And [mention, O Muḥammad], when Allāh took a covenant from those who were given the Scripture, [saying], "You must make it clear [i.e., explain it] to the people and not conceal it." But they threw it away behind their backs and exchanged it for a small price. And wretched is that which they purchased.

لَا يَرْقُبُونَ فِى مُؤْمِنٍ إِلًّا وَلَا ذِمَّةً ۚ وَأُو۟لَـٰٓئِكَ هُمُ ٱلْمُعْتَدُونَ

They do not observe toward a believer any pact of kinship or covenant of protection. And it is they who are the transgressors.

وَإِذَا كَالُوهُمْ أَو وَّزَنُوهُمْ يُخْسِرُونَ

But if they give by measure or by weight to them, they cause loss.