O Messenger! When you are with them and establish the congregations of prayers for them, let some of you stand guard, and let them hold their weapons standing with you as you prostrate. Then let the other group who has not prayed take their turn praying with you, while the others stand guard and hold their weapons. The disbelievers wish to see you neglect your weapons and equipment, and ambush you once and for all. You commit no error, if you are hampered by rain or injury, by putting down your weapons. But always be fully prepared against danger. Verily, Allah has readied a humiliating suffering for those who deny the Truth.