Numbers 4:13

And they shall take away the ashes out of the altar, and spread a scarlet cloth thereon:

Exodus 27:1-8

And thou shalt make an altar of sethim-wood: five cubits long and five cubits broad, that it be foursquare, and three cubits high.

Exodus 39:1

And of the jacinth, scarlet, purple and twined bysse, they made the vestments of ministration to do service in that holy place, and made the holy garments that pertained to Aaron, as the LORD commanded Moses.

Exodus 39:41

and the ministering vestments to serve in the holy place, and the holy vestments of Aaron the priest and his sons' raiments to minister in.

Leviticus 6:12-13

The fire that is upon the altar shall burn therein and not go out. And the priest shall put wood on the fire every morning, and put the burnt sacrifice upon it, and he shall burn thereon the fat of the peace offerings.

Numbers 4:6-9

and shall put thereon a covering of taxus' skins and shall spread a cloth that is altogether of jacinth, above all, and put the staves thereof in.

Numbers 4:11-12

And upon the golden altar they shall spread a cloth of jacinth, and put on her staves.

Treasury of Scripture Knowledge

Summary

And they shall take away the ashes from the altar, and spread a purple cloth thereon:

The embers of the sacred fire seem to have been removed in the grate, which was carried apart from the brazen altar; both being covered from view by purple cloths

General references

Bible References

The embers of the sacred fire seem to have been removed in the grate, which was carried apart from the brazen altar; both being covered from view by purple cloths

Numbers 4:6
and shall put thereon a covering of taxus' skins and shall spread a cloth that is altogether of jacinth, above all, and put the staves thereof in.
Exodus 27:3
And make his ashpans, shovels, basins, fleshhooks, firepans and all the apparel thereof, of brass;
Exodus 39:1
And of the jacinth, scarlet, purple and twined bysse, they made the vestments of ministration to do service in that holy place, and made the holy garments that pertained to Aaron, as the LORD commanded Moses.
Leviticus 6:12
The fire that is upon the altar shall burn therein and not go out. And the priest shall put wood on the fire every morning, and put the burnt sacrifice upon it, and he shall burn thereon the fat of the peace offerings.

General references

Numbers 4:8
and they shall spread upon them a covering of purple, and cover the same with a covering of taxus' skins, and put the staves thereof in.