'Hour' in the Bible

"No one knows when that day or hour will come not the angels in heaven, not the Son, but only the Father.

Going on a little farther, he fell to the ground and kept praying that if it were possible the hour might pass from him.

When he went back, he found his disciples asleep. "Simon, are you asleep?" he asked Peter. "You couldn't stay awake for one hour, could you?