TSK · John 1:21

Look, I will send you Elijah the prophet before the great and terrible day of the LORD arrives.

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

The disciples asked him,“Why then do the experts in the law say that Elijah must come first?”

So they asked John,“Why then are you baptizing if you are not the Christ, nor Elijah, nor the Prophet?”