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.