Quran Ayat regarding When you were fleeing after losing Allah gave you peace

154. Then after the distress, He sent down to you [335] security (in the form of) slumber that had surrounded a faction of you [336], while other factions were anxious about themselves, thinking of Allah unjustly [337]. The suspicion due to ignorance, saying: "And have we any power [338] in this affair?" Please declare: "The governance of their affairs is entirely in the hands of Allah." They conceal in their hearts what they dare not reveal [339] to you. They say: "If we had any power, then we would not have been killed here [340]." Please declare: "Even if you had remained in your homes, those for whom death had been decreed would have gone to the place of slaughter [341]." (It was) so that Allah might test what is in your breasts [342], and whatever is in your hearts might purge it. Allah knows well the secrets of your hearts [343].