Numbers 4:6, 8, 11, 14

and they shall put on it a covering of porpoise skin (fine leather), and shall spread over that a cloth of pure blue, and shall insert the carrying poles of the ark.

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

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

They shall also put on it all its utensils with which they minister in connection with it: the pans, the meat-forks, the shovels, the basins, and all the utensils of the altar; and they shall spread a covering of porpoise skin over it, and insert its carrying poles.