and fulfil the covenant which you have made with allah and do not break your oaths after having firmly made them and after having made allah your witness. surely allah knows all that you do.
وأوفوا بعهد الله إذا عاهدتم ولا تنقضوا الأيمان بعد توكيدها وقد جعلتم الله عليكم كفيلا إن الله يعلم ما تفعلون