'Night's' in the Bible

Hushai said further, You have knowledge of your father and his men, that they are men of war, and that their feelings are bitter, like those of a bear in the field whose young ones have been taken from her: and your father is a man of war, and will not take his night's rest with the people;

So now send the news quickly to David, and say, Do not take your night's rest by the way across the river to the waste land, but be certain to go over; or the king and all the people with him will come to destruction.