Mark 9:4
And Elijah and Moses appeared before them, talking with Jesus.

Malachi 3:1
"Behold, I will send My messenger, who will prepare the way before Me. Then the Lord whom you seek will suddenly come to His temple--the Messenger of the covenant, in whom you delight--see, He is coming, " says the LORD of Hosts.

Malachi 4:5
Behold, I will send you Elijah the prophet before the coming of the great and dreadful Day of the LORD.

Matthew 11:14
And if you are willing to accept it, he is the Elijah who was to come.

Matthew 17:10, 11
The disciples asked Him, "Why then do the scribes say that Elijah must come first?" . . .