Matthew 17:13 in the World English Bible
Then the disciples understood that he spoke to them of John the Baptizer.
Context
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.
13 Then the disciples understood that he spake unto them of John the Baptist.
14 And when they were come to the multitude, there came to him a certain man, kneeling down to him, and saying,