Mark 9:11-13

11And they asked him saying, Why do the scribes say that Elias must first have come?

12And he answering said to them, Elias indeed, having first come, restores all things; and how is it written of the Son of man that he must suffer much, and be set at nought:

13but I say unto you that Elias also is come, and they have done to him whatever they would, as it is written of him.