And when you (O dear Prophet Mohammed - peace and blessings be upon him) are among them and lead them in prayer, only a group of them should be with you, and they must keep their weapons with them; so when they have performed their prostrations they should move away behind you; and the other group that had not prayed, must come and offer prayers in your leadership, keeping their guard and weapons with them; the disbelievers wish that you neglect your arms and your means so they may overpower you with a single attack; it is no sin for you to lay aside your arms due to rain or if you are sick; and keep your guard; undoubtedly Allah has kept prepared a disgraceful punishment for the disbelievers.