Matthew 17:11 KJV
And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
Matthew 17:11, King James Version
In context
10 And his disciples asked him, saying, Why then say the scribes that Elias must first come?
11 And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
12 But I say unto you, That Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.