C. F. Keil and Franz Delitzsch on Nehemiah 4:22

Neh 4:22

He took moreover, a further precaution: he said to the people (i.e., to the labourers on the wall, and not merely to the warriors of the community, as Bertheau supposes): Let every one with his servant lodge within Jerusalem, i.e., to remain together during the night also, and not be scattered through the surrounding district, “that they may be guardianship for us by night and labour by day.” The abstracts, guardianship and labour, stand for the concretes, guards and labourers. As לנוּ, to us, refers to the whole community separated on the walls, so is ונערו אישׁ to be understood of all the workers, and not of the fighting men only. From ונערו אישׁ it only appears that the fathers of families and master builders had servants with them as labourers.