'O'clock' in the Bible

So keep on watching, because you don't know when the master of the house is coming whether in the evening, at three o'clock in the morning, or at dawn.

It was nine o'clock in the morning when they crucified him.

When the sixth hour (noon) came, darkness covered the whole land until the ninth hour (3:00 p.m.).

At three o'clock, Jesus cried out with a loud voice, "Eloi, eloi, lema sabachthani?" (which means, "My God, my God, why have you forsaken me?")