Exodus 40:18-20

18When Moses set up the tabernacle, he put the bases in place, erected the frames, inserted the crossbars and set up the posts.

19Then he spread the tent over the tabernacle and put the covering over the tent, as the LORD commanded him. 20He took the tablets of the covenant law and placed them in the ark, attached the poles to the ark and put the atonement cover over it.