Read Mark 9:12 Using Other Translations
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.
And he said to them, "Elijah does come first to restore all things. And how is it written of the Son of Man that he should suffer many things and be treated with contempt?
Jesus responded, “Elijah is indeed coming first to get everything ready. Yet why do the Scriptures say that the Son of Man must suffer greatly and be treated with utter contempt?