Exodus 26:15-19

You are to construct upright frames of acacia wood for the tabernacle.

Each frame is to be ten cubits long and a cubit and a half wide.

Two tenons must be connected to each other for each frame. Make all the frames of the tabernacle in this way.

Construct twenty frames for the south side of the tabernacle,

with forty silver bases under the twenty frames—two bases for each frame, one under each tenon.