Matthew 17:12
But I tell you that Elijah has already come, and they did not recognize him, but did to him whatever they pleased. So also the Son of Man will suffer at their hands. The identification of the already-come Elijah as John the Baptist (confirmed in verse 13) is paired with the passion prediction: the Elijah who came was rejected and treated as they pleased (imprisoned and beheaded), and the same rejection awaits the Son of Man. The forerunner's fate anticipates the one whose way he prepared.