John 11:9-13

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

But if anyone walks during the night, he stumbles, because the light is not in him.”

This He said, and after this He *said to them, “Our friend Lazarus has fallen asleep; but I am going so that I may awaken him from sleep.”

The disciples then said to Him, “Lord, if he has fallen asleep, he will come out of it.”

Now Jesus had spoken of his death, but they thought that He was speaking about actual sleep.