Read and reflect on verse 522 from Surah An-Nisaa: O YOU who have attained to faith! Do not devour one another's possessions wrongfully - not even by way of trade based on mutual agreement - and do not...
يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَأْكُلُوا أَمْوَالَكُمْ بَيْنَكُمْ بِالْبَاطِلِ إِلَّا أَنْ تَكُونَ تِجَارَةً عَنْ تَرَاضٍ مِنْكُمْ ۚ وَلَا تَقْتُلُوا أَنْفُسَكُمْ ۚ إِنَّ اللَّهَ كَانَ بِكُمْ رَحِيمًا
O YOU who have attained to faith! Do not devour one another's possessions wrongfully - not even by way of trade based on mutual agreement - and do not destroy one another: for, behold, God is indeed a dispenser of grace unto you!