Exodus 36:24

And he made forty bases of silver under the twenty frames , two bases under one frame for its two tenons , and two bases under the next frame for its two tenons .

and made forty silver bases to go under them—two bases for each frame, one under each projection.

And forty sockets of silver he made under the twenty boards; two sockets under one board for his two tenons, and two sockets under another board for his two tenons.