if allah assists you then there is none that can overcome you and if he forsakes you who is there then that can assist you after him? and on allah should the believers rely.
إن ينصركم الله فلا غالب لكم وإن يخذلكم فمن ذا الذي ينصركم من بعده وعلى الله فليتوكل المؤمنون