Matthew 17:10

7 and Jesus having come near, touched them, and said, `Rise, be not afraid,`

8 and having lifted up their eyes, they saw no one, except Jesus only.

9 And as they are coming down from the mount, Jesus charged them, saying, `Say to no one the vision, till the Son of Man out of the dead may rise.`

10 And his disciples questioned him, saying, `Why then do the scribes say that Elijah it behoveth to come first?`

11 And Jesus answering said to them, `Elijah doth indeed come first, and shall restore all things,

12 and I say to you -- Elijah did already come, and they did not know him, but did with him whatever they would, so also the Son of Man is about to suffer by them.`

13 Then understood the disciples that concerning John the Baptist he spake to them.