TSK · 2 Chronicles 6:11

He took the testimony and put it in the ark, attached the poles to the ark, and then put the atonement lid on the ark.

and set up in it a place for the ark containing the covenant the LORD made with our ancestors when he brought them out of the land of Egypt.”

There was nothing in the ark except the two tablets Moses had placed there in Horeb.(It was there that the LORD made a covenant with the Israelites after he brought them out of the land of Egypt.)