Mark 9:4

9:4 Then Elijah appeared before them along with Moses, and they were talking with Jesus.

Malachi 3:1

3:1 “I am about to send my messenger, who will clear the way before me. Indeed, the Lord you are seeking will suddenly come to his temple, and the messenger of the covenant, whom you long for, is certainly coming,” says the Lord who rules over all.

Malachi 4:5

4:5 Look, I will send you Elijah the prophet before the great and terrible day of the Lord arrives.

Matthew 11:14

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

Matthew 17:10-11

17:10 The disciples asked him, “Why then do the experts in the law say that Elijah must come first?” 17:11 He answered, “Elijah does indeed come first and will restore all things.