those who swore fealty to you in fact swore fealty to allah. the hand of allah is above their hands. so whoever breaks his covenant breaks it to his own hurt and whoever fulfils the covenant that he made with allah he will bestow on him a great reward.
إن الذين يبايعونك إنما يبايعون الله يد الله فوق أيديهم فمن نكث فإنما ينكث على نفسه ومن أوفى بما عاهد عليه الله فسيؤتيه أجرا عظيما