[A/I`mran 3:154] Then after grief, He sent down a peaceful slumber (calm), which engulfed a group among you - and another party kept fearing for their own lives, thinking wrongfully of Allah - like the thoughts of ignorance; they say, “Do we have any authority in this matter?” Say (O dear Prophet Mohammed - peace and blessings be upon him), “All authority lies only with Allah”; they hide in their hearts what they do not reveal to you; they say, “Had we any control, we would not have been slain here”; say, “Even if you had been in your houses, those destined to be slain would have come forth to their places of slaying; and in order that Allah may test what is in your breasts and reveal whatever is in your hearts”; and Allah knows well what lies within the hearts.

[A/I`mran 3:155] Indeed those of you who turned back on the day when the two armies met - for it was the devil who caused them to waver, because of some of their deeds; and undoubtedly Allah has forgiven them; indeed Allah is Oft Forgiving, Most Forbearing.

Section 17

[A/I`mran 3:156] O People who Believe! Do not be like the disbelievers who said regarding their brothers who went on a journey or on holy war, “If they had been here with us they would not have died or been killed” - so that Allah may make it as despair in their hearts; and Allah gives life and causes death; and Allah is seeing your deeds.

[A/I`mran 3:157] And if you are killed in Allah’s way or die, then the pardon from Allah and mercy are better than all what they hoard.