Nehemiah 4:21-23

So we continued the work with half the men holding spears, from the first light of dawn till the stars came out. At that time I also said to the people, “Have every man and his helper stay inside Jerusalem at night, so they can serve us as guards by night and as workers by day.” Neither I nor my brothers nor my men nor the guards with me took off our clothes; each had his weapon, even when he went for water.