وَاَوۡفُوۡا بِعَهۡدِ اللّٰهِ اِذَا عٰهَدتُّمۡ وَلَا تَنۡقُضُوۡا الۡاَيۡمَانَ بَعۡدَ تَوۡكِيۡدِهَا وَقَدۡ جَعَلۡتُمُ اللّٰهَ عَلَيۡكُمۡ كَفِيۡلاً ؕ اِنَّ اللّٰهَ يَعۡلَمُ مَا تَفۡعَلُوۡنَ
And always fulfil the promise of Allah when you promise, and do not break oaths after making them firm while you have already made Allah a surety over you. Surely Allah knows well whatever you do.