Elijah has not died yet, and no one knows where the body of Moses is located (picture of the law being dead, fulfilled).
The Scripture does say that Moses died
Then Moses went up from the plains of Moab to Mount Nebo, to the top of Pisgah, which faces Jericho. And the LORD showed him the whole land—from Gilead as far as Dan, all of Naphtali, the land of Ephraim and Manasseh, all the land of Judah as far as the Western Sea, the Negev, and the region from the Valley of Jericho (the City of Palms) all the way to Zoar.
And the LORD said to him, “This is the land that I swore to give Abraham, Isaac, and Jacob when I said, ‘I will give it to your descendants.’ I have let you see it with your own eyes, but you will not cross into it.”
So Moses the servant of the LORD died there in the land of Moab, as the LORD had said. And He buried him in a valley in the land of Moab facing Beth-peor, and no one to this day knows the location of his grave.
Deut 34