'Keep Watch' in the Bible

Why do you keep watching the tiny speck in your brother's eye, but pay no attention to the girder in your own?

Keep watch, then, because you are not certain of the day or of the hour.

Then He said to them, “My soul is deeply grieved, so that I am almost dying of sorrow. Stay here and stay awake and keep watch with Me.”

And He came to the disciples and found them sleeping, and said to Peter, “So, you men could not stay awake and keep watch with Me for 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.

And sitting down, they began to keep watch over Him there.