وَأَوْفُوا بِعَهْدِ ٱللَّهِ إِذَا عَـٰهَدتُّمْ وَلَا تَنقُضُوا ٱلْأَيْمَـٰنَ بَعْدَ تَوْكِيدِهَا وَقَدْ جَعَلْتُمُ ٱللَّهَ عَلَيْكُمْ كَفِيلًا ۚ إِنَّ ٱللَّهَ يَعْلَمُ مَا تَفْعَلُونَ

Waawfoo biAAahdi Allahi ithaAAahadtum wala tanqudoo al-aymanabaAAda tawkeediha waqad jaAAaltumu Allaha AAalaykumkafeelan inna Allaha yaAAlamu ma tafAAaloon

And fulfill the covenant of Allāh when you have taken it, [O believers], and do not break oaths after their confirmation while you have made Allāh, over you, a security [i.e., witness]. Indeed, Allāh knows what you do.