His disciples replied, "Lord, if he is sleeping, he will get better."

Matthew 9:24
"Go away," He told them. "The girl is not dead, but asleep." And they laughed at Him.

John 11:11
After He had said this, He told them, "Our friend Lazarus has fallen asleep, but I am going there to wake him up."

John 11:13
They thought that Jesus was talking about actual sleep, but He was speaking about the death of Lazarus.

Then said his disciples, Lord, if he sleep, he shall do well.