Matthew 17:12

12 but I tell you that Elijah has already come, and they did not recognize him, but they did to him whatever they pleased. So also the Son of Man is about to suffer at their hands."

Matthew 17:12 In-Context

10 And the disciples asked him, "Why, then, do the scribes say that Elijah must come first?"
11 He replied, "Elijah is indeed coming and will restore all things;
12 but I tell you that Elijah has already come, and they did not recognize him, but they did to him whatever they pleased. So also the Son of Man is about to suffer at their hands."
13 Then the disciples understood that he was speaking to them about John the Baptist.
14 When they came to the crowd, a man came to him, knelt before him,
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.