An-Nisa 4:102 واذا كنت فيهم فاقمت لهم الصلاة فلتقم طايفة منهم معك ولياخذوا اسلحتهم فاذا سجدوا فليكونوا من ورايكم ولتات طايفة اخرى لم يصلوا فليصلوا معك ولياخذوا حذرهم واسلحتهم ود الذين كفروا لو تغفلون عن اسلحتكم وامتعتكم فيميلون عليكم ميلة واحدة ولا جناح عليكم ان كان بكم اذى من مطر او كنتم مرضى ان تضعوا اسلحتكم وخذوا حذركم ان الله اعد للكافرين عذابا مهينا ١٠٢

And when you [i.e., the commander of an army] are among them and lead them in prayer,¹ let a group of them stand [in prayer] with you and let them carry their arms. And when they have prostrated, let them be [in position] behind you and have the other group come forward which has not [yet] prayed and let them pray with you, taking precaution and carrying their arms. Those who disbelieve wish that you would neglect your weapons and your baggage so they could come down upon you in one [single] attack. But there is no blame upon you, if you are troubled by rain or are ill, for putting down your arms, but take precaution. Indeed, Allāh has prepared for the disbelievers a humiliating punishment.