Ali 'Imran 3:154 ثم انزل عليكم من بعد الغم امنة نعاسا يغشى طايفة منكم وطايفة قد اهمتهم انفسهم يظنون بالله غير الحق ظن الجاهلية يقولون هل لنا من الامر من شيء قل ان الامر كله لله يخفون في انفسهم ما لا يبدون لك يقولون لو كان لنا من الامر شيء ما قتلنا هاهنا قل لو كنتم في بيوتكم لبرز الذين كتب عليهم القتل الى مضاجعهم وليبتلي الله ما في صدوركم وليمحص ما في قلوبكم والله عليم بذات الصدور ١٥٤

Then after the distress, He sent down security for you. Slumber overtook a party of you, while another party was thinking about themselves (as how to save their ownselves, ignoring the others and the Prophet صلى الله عليه وسلم) and thought wrongly of Allâh - the thought of ignorance. They said, "Have we any part in the affair?" Say (O Muhammad صلى الله عليه وسلم): "Indeed the affair belongs wholly to Allâh." They hide within themselves what they dare not reveal to you, saying: "If we had anything to do with the affair, none of us would have been killed here." Say: "Even if you had remained in your homes, those for whom death was decreed would certainly have gone forth to the place of their death," but that Allâh might test what is in your breasts; and to purify ¹ that which was in your hearts (sins), and Allâh is All-Knower of what is in (your) breasts.