Exodus 36:18-20

Young's Literal Translation

¹⁸ and he maketh fifty hooks of brass to join the tent -- to be one;

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;