Mark 9:11
And they asked him, saying, "{Why do} the scribes say that Elijah must come first?"
Matthew 11:14
and if you are willing to accept [it], he is Elijah, the one who is going to come.
Malachi 4:5
Look! I [am] going to send to you Elijah the prophet before the coming of the great and awesome day of Yahweh!
Mark 9:4
And Elijah appeared to them together with Moses, and they were talking with Jesus.
Malachi 3:1
"Look! I [am] going to send my messenger, and he will prepare [the] way {before me}. And the Lord whom you [are] seeking will come suddenly to his temple, and the messenger of the covenant, [in] whom you [are] taking pleasure--look!--[he is] about to come," says Yahweh of hosts.
Matthew 17:10-11
And the disciples asked him, saying, "Then why do the scribes say that Elijah must come first?"