'Watches' in the Bible

And they and their sons are over the gates of the house of Jehovah, even of the house of the tent, by watches.

If I have remembered Thee on my couch, In the watches -- I meditate on Thee.

Thou hast taken hold of the watches of mine eyes, I have been moved, and I speak not.

Mine eyes have gone before the watches, To meditate in Thy saying.

Arise, cry aloud in the night, At the beginning of the watches. Pour out as water thy heart, Over against the face of the Lord, Lift up unto Him thy hands, for the soul of thine infants, Who are feeble with hunger at the head of all out-places.