JST, Matthew 11:13–15. Compare Matthew 11:10–11, 13–14

John the Baptist is the Elias who would come to prepare the way for the Savior.

13 But the days will come, when the violent shall have no power; for all the prophets and the law prophesied that it should be thus until John.

14 Yea, as many as have prophesied have foretold of these days.

15 And if ye will receive it, verily, he was the Elias, who was for to come and prepare all things.