1 Samuel 30:16-17

They were spread upon all the earth Secure and careless, because they were now come almost to the borders of their own country, and the Philistines and Israelites both were otherwise engaged, and David, as they believed, with them. So they had no visible cause of danger; and yet then they were nearest to destruction! David smote them from the twilight The word signifies both the morning and evening twilight. But the latter seems here intended, partly because their eating, and drinking, and dancing, was more proper work for the evening than the morning; and partly because the evening was more convenient for David, that the fewness of his forces might not be discovered by the daylight. It is probable that, when he came near them, he reposed himself and his army in some secret place, whereof there were many in those parts, for a convenient season; and then marched on so as to come to them at the evening time.