Exodus 36:31-33

Young's Literal Translation

³¹ And he maketh bars of shittim wood, five for the boards of the one side of the tabernacle,

³² and five bars for the boards of the second side of the tabernacle, and five bars for the boards of the tabernacle, for the sides westward;

³³ and he maketh the middle bar to enter into the midst of the boards from end to end;