Numbers 4:11-13

Amplified Bible

¹¹ 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; ¹² and they shall take all the utensils of the service with which they minister in the sanctuary, and put them in a blue cloth, and cover them with a covering of porpoise skin, and put them on the carrying bars. ¹³ Then they shall clean away the ashes from the altar [of burnt offering], and spread a purple cloth over it.