28. Do not Betray trust of people

Surah No. 8, Al Anfaal, Ayats No. 27

يَا أَيُّهَا الَّذِينَ آمَنُواْ لاَ تَخُونُواْ اللّهَ وَالرَّسُولَ وَتَخُونُواْ أَمَانَاتِكُمْ وَأَنتُمْ تَعْلَمُونَ

Translation :

O believers ! Betray not Allah and His messenger, nor knowingly betray each other in things entrusted to you, you know its sufferings well.