“Why do the religious teachers state that Elijah has to come first?” they asked him.
Look! I am sending my messenger, and he will prepare the way for me. The Lord you are seeking will suddenly arrive at his Temple. The messenger of the agreement you say is so happy with you is coming, says the Lord Almighty.
Look! I am going to send Elijah the prophet before the day of the Lord arrives, the great and terrifying day.
If you're prepared to believe it, he is Elijah, the one who was expected to come.
They kept this to themselves, but they did argue with each other over what it meant to rise from the dead.
Then Elijah and Moses appeared in front of them as well, talking with Jesus.