Numbers 4:6, 8, 11, 14

and they shall lay a covering of porpoise skin on it, and shall spread over it a cloth of pure blue, and shall insert its poles.

They shall spread over them a cloth of scarlet material, and cover the same with a covering of porpoise skin, and they shall insert its poles.

Over the golden altar they shall spread a blue cloth and cover it with a covering of porpoise skin, and shall insert its poles

They shall also put on it all its utensils by which they serve in connection with it: the firepans, the forks and shovels and the basins, all the utensils of the altar; and they shall spread a cover of porpoise skin over it and insert its poles.