indeed the worst of living creatures in the sight of allah are those who have disbelieved and they will not believe the ones with whom you made a treaty but then they break their pledge every time and they do not fear allah.
إن شر الدواب عند الله الذين كفروا فهم لا يؤمنون الذين عاهدت منهم ثم ينقضون عهدهم في كل مرة وهم لا يتقون