'Ink' in the Bible

using an iron stylus with lead for ink! Then they'd be engraved in rock forever.

Then Baruch answered them, He pronounced all these words unto me with his mouth, and I wrote them with ink in the book.

Behold, six men [angelic beings] came from the direction of the Upper Gate, which faces north, each with his battle-axe in his hand; and among them was a certain man clothed in linen, with a scribe’s writing case at his side. They entered and stood beside the bronze altar.

Then the [Shekinah] glory and brilliance of the God of Israel (the cloud) went up from the cherubim on which it had rested, to [stand above] the threshold of the [Lord’s] temple. And the Lord called to the man clothed with linen, who had the scribe’s writing case at his side.

But to the others I heard Him say, “Follow him [the man with the scribe’s writing case] throughout the city and strike; do not let your eyes have pity and do not spare [anyone].

Then behold, the man clothed in linen, who had the scribe’s writing case at his side, reported, “I have done just as You have commanded me.”