Exodus 40:18-20

MSB(i) 18 When Moses set up the tabernacle, he laid its bases, positioned its frames, inserted its crossbars, and set up its posts. 19 Then he spread the tent over the tabernacle and put the covering over the tent, just as the LORD had commanded him. 20 Moses took the Testimony and placed it in the ark, attaching the poles to the ark; and he set the mercy seat atop the ark.