'Watch' in the Bible

So Gideon and the hundred men who were with him came to the edge of the camp at the beginning of the middle watch, when the guards had just been changed, and they blew the trumpets and smashed the pitchers that were in their hands.

and watch; if the daughters of Shiloh come out to dance in the dances, then you shall come out of the vineyards and each of you shall catch his wife from the daughters of Shiloh, and go to the land of [the tribe of] Benjamin.