Job 19:24

would God they were graven with an iron pen in lead or in stone.

Jeremiah 17:1

your sin, O ye of the tribe of Judah, is written in the table of your hearts, and graven so upon the edges of your altars with a pen of iron and with an adamant claw:

Exodus 28:11-12

After the work of a stone graver, even as signets are graven, shalt thou grave the two stones with the names of the children of Israel, and shalt make them to be set in ouches of gold.

Exodus 28:21

And the stones shall be graven as signets be graven: with the names of the children of Israel, even with twelve names every one with his name according to the twelve tribes.

Exodus 32:16

and were the work of God, and the writing was the writing of God graven upon the tables.

Deuteronomy 27:2-3

And when ye be come over Jordan unto the land which the LORD thy God giveth thee, set up great stones and plaster them with plaster,

Deuteronomy 27:8

And thou shalt write upon the stones all the words of this law, manifestly and well."

Treasury of Scripture Knowledge

Summary

That they were graven with an iron pen and lead in the rock for ever!

General references

Bible References

Graven

Exodus 28:11
After the work of a stone graver, even as signets are graven, shalt thou grave the two stones with the names of the children of Israel, and shalt make them to be set in ouches of gold.
Exodus 32:16
and were the work of God, and the writing was the writing of God graven upon the tables.
Deuteronomy 27:2
And when ye be come over Jordan unto the land which the LORD thy God giveth thee, set up great stones and plaster them with plaster,
Jeremiah 17:1
your sin, O ye of the tribe of Judah, is written in the table of your hearts, and graven so upon the edges of your altars with a pen of iron and with an adamant claw:

General references

Deuteronomy 6:9
and shalt write them upon the posts of thy house and upon thy gates.
Jeremiah 30:2
"Thus sayeth the LORD God of Israel: Write up diligently all the words, that I have spoken unto thee, in a book.