Exodus 36:22 in the World English Bible
Each board had two tenons, joined to one another. He made all the boards of the tabernacle this way.
Context
21 The length of a board was ten cubits, and the breadth of a board one cubit and a half.
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: