'Hours' in the Bible

Jesus answered, “Are there not twelve hours in the day? If anyone walks in the day, he does not stumble, because he sees the light of this world.

Now there elapsed an interval of about three hours, and his wife came in, not knowing what had happened.

But when they recognized that he was a Jew, a single outcry arose from them all as they shouted for about two hours, “Great is Artemis of the Ephesians!”