In the previous chapter, Moses and Joshua with him, head back up Mount Sinai to meet with God. In chapter 25 God begins to give Moses instructions to build the tabernacle and the ark of the covenant. This was to be a portable place where God would be able to dwell with them as they journeyed to the promised land

It amazes me how ornate and specific the instructions were, obviously Israel had very talented people to be able to complete the ark and the tabernacle as described by God