TSK · Mark 9:11

“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 of Heaven’s Armies.

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

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