John 11:11-17

11These things spake he: and after this he saith unto them, Our friend Lazarus is fallen asleep; but I go, that I may awake him out of sleep. 12The disciples therefore said unto him, Lord, if he is fallen asleep, he will recover. 13Now Jesus had spoken of his death: but they thought that he spake of taking rest in sleep. 14Then Jesus therefore said unto them plainly, Lazarus is dead. 15And I am glad for your sakes that I was not there, to the intent ye may believe; nevertheless let us go unto him. 16Thomas therefore, who is called Didymus, said unto his fellow-disciples, Let us also go, that we may die with him.

17So when Jesus came, he found that he had been in the tomb four days already.