'Sleeping' in the Bible

Now everyone was crying and wailing for her. But Jesus said, "Stop crying! She's not dead. She's sleeping."

I say to you, In that night there will be two men sleeping in one bed, and one will be taken away and the other let go.

And when he rose up from prayer, and was come to his disciples, he found them sleeping for sorrow,

“Why are you sleeping?” He asked them. “Get up and pray, so that you won’t enter into temptation.”