'Keep Watch' in the Bible

Take care, keep watch with prayer: for you are not certain when the time will be.

"It is like a man, traveling to another country, having left his house, and given authority to his servants, and to each one his work, and also commanded the doorkeeper to keep watch.

So you are to keep watch: because you are not certain when the master of the house is coming, in the evening, or in the middle of the night, or at the cock's cry, or in the morning;

And what I say to you, I say to all, Keep watch.

And he said to them, My soul is very sad, even to death: be here a little time, and keep watch.

And he came, and saw them sleeping, and said to Peter, Simon, are you sleeping? were you not able to keep watch one hour?

Keep watch with prayer, so that you may not be put to the test; the spirit truly is ready, but the flesh is feeble.