Exodus 36:19-21

Young's Literal Translation

¹⁹ and he maketh a covering for the tent of rams' skins made red, and a covering of badgers' skins above.

²⁰ And he maketh the boards for the tabernacle of shittim wood, standing up;

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