Why say the scribes ... - See the notes at Matthew 17:10-13.
Related Commentaries of Mark 9:11
Mark 9:11-13
11 And they asked him, saying, Why say the scribes that Elias must first come?
12 And he answered and told them,Elias verily cometh first, and restoreth all things; and how it is written of the Son of man, that he must suffer many things, and be set at nought.
13 But I say unto you,That Elias is indeed come, and they have done unto him whatsoever they listed, as it is written of him.