Numbers 4:13

And they shall take away the ashes from the altar and spread a purple cloth over it.

Exodus 27:1-8

"You shall make the altar of acacia wood, five cubits long and five cubits broad. The altar shall be square, and its height shall be three cubits.

Exodus 39:1

From the blue and purple and scarlet yarns they made finely woven garments, for ministering in the Holy Place. They made the holy garments for Aaron, as the LORD had commanded Moses.

Exodus 39:41

the finely worked garments for ministering in the Holy Place, the holy garments for Aaron the priest, and the garments of his sons for their service as priests.

Leviticus 6:12-13

The fire on the altar shall be kept burning on it; it shall not go out. The priest shall burn wood on it every morning, and he shall arrange the burnt offering on it and shall burn on it the fat of the peace offerings.

Numbers 4:6-9

Then they shall put on it a covering of goatskin and spread on top of that a cloth all of blue, and shall put in its poles.

Numbers 4:11-12

And over the golden altar they shall spread a cloth of blue and cover it with a covering of goatskin, and shall put in its poles.

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
Then they shall put on it a covering of goatskin and spread on top of that a cloth all of blue, and shall put in its poles.
Exodus 27:3
You shall make pots for it to receive its ashes, and shovels and basins and forks and fire pans. You shall make all its utensils of bronze.
Exodus 39:1
From the blue and purple and scarlet yarns they made finely woven garments, for ministering in the Holy Place. They made the holy garments for Aaron, as the LORD had commanded Moses.
Leviticus 6:12
The fire on the altar shall be kept burning on it; it shall not go out. The priest shall burn wood on it every morning, and he shall arrange the burnt offering on it and shall burn on it the fat of the peace offerings.

General references

Numbers 4:8
Then they shall spread over them a cloth of scarlet and cover the same with a covering of goatskin, and shall put in its poles.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.