Exodus 36:21-23

Young's Literal Translation

²¹ ten cubits [is] the length of the [one] board, and a cubit and a half the breadth of the [one] board;

²² two handles [are] to the one board, joined one unto another; so he hath made for all the boards of the tabernacle.

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