Numbers 4:11-13

The Voice

¹¹ Concerning the golden altar for incense, they shall cover it first with a blue cloth, and over that with a sea-cow skin. They shall insert its poles. ¹² Likewise, all of the furnishings used in sanctuary service should go into a blue cloth, be covered with a sea-cow skin, and set on a carrying frame. ¹³ They will need to empty the fat ashes from the burnt offering altar before spreading a purple cloth over it.