'Watch' in the Bible

Seeing the disciples straining at the oars, because the wind was against them, at about the fourth watch of the night (3:00-6:00 a.m.) He came to them, walking on the sea. And [acted as if] He intended to pass by them.

“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.

It is like a man away on a journey, who when he left home put his servants in charge, each with his particular task, and also ordered the doorkeeper to be continually alert.

Therefore, be continually on the alert—for you do not know when the master of the house is coming, whether in the evening, or at midnight, or when the rooster crows, or in the morning—

[stay alert,] in case he should come suddenly and unexpectedly and find you asleep and unprepared.

What I say to you I say to everyone, ‘Be on the alert [stay awake and be continually cautious]!’”

And He came back and found them sleeping, and He said to Peter, “Simon, are you asleep? Were you unable to keep watch for one hour?

Keep [actively] watching and praying so that you do not come into temptation; the spirit is willing, but the body is weak.”