Exodus 36:1-3

“Bezalel and Oholiab, and every skilled person in whom the LORD has put ability and understanding to know how to do all the work in the construction of the sanctuary, shall work according to all that the LORD has commanded.” So Moses called Bezalel and Oholiab and every skilled person in whom the LORD had put ability, everyone whose heart stirred him, to come to do the work. They received from Moses all the offerings which the Israelites had brought for the construction of the sanctuary, to prepare it for service. And they continued to bring him freewill (voluntary) offerings every morning.