Numbers 4:13

The Census Of The Kohathites

¹² They will take all the vessels of the cultic service with which they serve in the sanctuary and put [them] on a blue cloth, and they will cover them with a covering of {fine leather}; and they will put [them] on the carrying frame. ¹³ They will remove the fat-soaked ashes from the altar and spread a purple cloth over it; ¹⁴ they will put on it all the vessels with which they serve, the fire pans, forks, shovels, and bowls--all the vessels of the altar. They will spread on it a covering of {fine leather}; and they will place its poles.

Burnt Offering

Cleanse the Altar

Exodus 27:1-8

"And you will make the altar of acacia wood, five cubits long and five cubits wide; the altar will be square, and its height [will be] three cubits.

Exodus 39:1

And from the blue and the purple and the crimson [yarns] they made woven garments for serving in the sanctuary, and they made the holy garments that were for Aaron, as Yahweh had commanded Moses.

Exodus 39:41

the woven garments for serving in the sanctuary--the holy garments for Aaron the priest and the garments for his sons to serve as priests.

Leviticus 6:12-13

but the fire on the altar must be kept burning on it; it must not be quenched. And the priest must burn wood {every morning} on it, and he shall arrange the burnt offering on it, and he shall turn into smoke the fat portions of the fellowship offerings on it.

Numbers 4:6-9

They will put on it a covering of {fine leather}, and they will spread a cloth of perfect blue over it, and they will place its poles.

Numbers 4:11-12

Over the altar of gold they will spread a blue cloth, and they will cover it with a covering of {fine leather} and place its poles.