﴿وَأَوْفُوا بِعَهْدِ اللَّهِ إِذَا عَاهَدْتُمْ وَلَا تَنْقُضُوا الْأَيْمَانَ بَعْدَ تَوْكِيدِهَا وَقَدْ جَعَلْتُمُ اللَّهَ عَلَيْكُمْ كَفِيلًا ۚ إِنَّ اللَّهَ يَعْلَمُ مَا تَفْعَلُونَ﴾
91. And fulfil the Covenant of Allâh (Bai‘ah: pledge for Islâm) when you have covenanted, and break not the oaths after you have confirmed them - and indeed you have appointed Allâh your surety. Verily! Allâh knows what you do.