'Ink' in the Bible

revealing that you are a letter of Christ, delivered by us, written not with ink but by the Spirit of the living God, not on stone tablets but on tablets of human hearts.

Though I have many other things to write to you, I do not want to do so with paper and ink, but I hope to come visit you and speak face to face, so that our joy may be complete.

I have many things to write to you, but I do not wish to write to you with pen and ink.