And they began asking Him, saying, “Why is it that the scribes say that Elijah must come first?”
“Behold, I am going to send My messenger, and he will prepare the way before Me. And the Lord, whom you seek, will suddenly come to His temple; and the messenger of the covenant, in whom you delight, behold, He is coming,” says Yahweh of hosts.
“Behold, I am going to send you Elijah the prophet before the coming of the great and awesome day of Yahweh.
And if you are willing to accept it, John himself is Elijah who was to come.
And they seized upon that statement, arguing with one another what rising from the dead meant.
And Elijah appeared to them along with Moses and they were conversing with Jesus.