Swindling

He who sells a flawed commodity, not stating it, remains despised by Allah, and the angels continuously curse him.

رسولُ اللَّهِ صلى اللَّه عليه وآله :  مَن باعَ عَيباً لَم يُبَيِّنْهُ لَم يَزَلْ في مَقتِ اللَّهِ ، ولَم تَزَلِ المَلائكةُ تَلعَنُهُ . كنز العمّال : 9501 .

 The Prophet (SAWA) said, ‘He who sells a flawed commodity, not stating it, remains despised by Allah, and the angels continuously curse him.’ Kanz al-Ummal, no. 9501

رسولُ اللَّهِ صلى اللَّه عليه وآله :  مَن غَشَّ أخاهُ المُسلِمَ نَزَعَ اللَّهُ عَنهُ بَرَكةَ رِزقِهِ، وأفسَدَ علَيهِ مَعيشَتَهُ، ووَكَلَهُ إلى‏ نفسِهِ . بحار الأنوار : 76 / 365 / 30 .

 The Prophet (SAWA) said, ‘He who swindles a fellow Muslim brother, Allah snatches away the benediction in his sustenance, thwarts his efforts at earning a livelihood, and relegates him to his own base self.’ Bihar al-Anwar, v. 76, p. 365, no. 30