Exodus 36:22-24

King James Version

²² One board had two tenons, equally distant one from another: thus did he make for all the boards of the tabernacle.

²³ And he made boards for the tabernacle; twenty boards for the south side southward:

²⁴ 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.