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 distress, He sent down upon you security [in the form of] drowsiness, overcoming a faction of you, while another faction worried about themselves, thinking of Allāh other than the truth - the thought of ignorance, saying, "Is there anything for us [to have done] in this matter?" Say, "Indeed, the matter belongs completely to Allāh." They conceal within themselves what they will not reveal to you. They say, "If there was anything we could have done in the matter, we [i.e., some of us] would not have been killed right here." Say, "Even if you had been inside your houses, those decreed to be killed would have come out to their death beds." [It was] so that Allāh might test what is in your breasts and purify what is in your hearts. And Allāh is Knowing of that within the breasts.