Numbers 4:13

After they take the ashes away, they will spread a purple cloth over the altar.

Exodus 27:1-8

Build the altar with acacia wood. It should be seven and one half feet square and four and one half feet tall.

Exodus 39:1

From the violet, purple, and bright red yarn they made special clothes worn for official duties in the holy place. They also made the holy clothes for Aaron. They obeyed Jehovah's instructions to Moses.

Exodus 39:41

the special clothes worn when serving as priests in the holy place, both the holy clothes for the priest Aaron and the clothes for his sons when serving as priests.

Leviticus 6:12-13

The fire must always be burning on the altar. It must never go out. The priest will burn wood on it every morning. He will lay the burnt offering on the fire and burn the fat of the fellowship offering.

Numbers 4:6-9

Over this they will put a covering of fine leather. On top of that they will spread a cloth made entirely of violet material. Then they will put the poles in place.

Numbers 4:11-12

They will spread a violet cloth over the gold altar and cover the cloth with fine leather. Then they will put the poles in place.

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
Over this they will put a covering of fine leather. On top of that they will spread a cloth made entirely of violet material. Then they will put the poles in place.
Exodus 27:3
Make all the utensils for it out of copper: pots for taking away the altar's ashes, also shovels, bowls, forks, and incense burners.
Exodus 39:1
From the violet, purple, and bright red yarn they made special clothes worn for official duties in the holy place. They also made the holy clothes for Aaron. They obeyed Jehovah's instructions to Moses.
Leviticus 6:12
The fire must always be burning on the altar. It must never go out. The priest will burn wood on it every morning. He will lay the burnt offering on the fire and burn the fat of the fellowship offering.

General references

Numbers 4:8
They will spread a bright red cloth over everything on the table. They will then cover all this with fine leather. Then they will put the poles in place.