Gospel, Matthew 17:10-13
10 And the disciples put this question to him, ‘Why then do the scribes say that Elijah must come first?’
11 He replied, ‘Elijah is indeed coming, and he will set everything right again;
12 however, I tell you that Elijah has come already and they did not recognise him but treated him as they pleased; and the Son of man will suffer similarly at their hands.’
13 Then the disciples understood that he was speaking of John the Baptist.