'Ink' in the Bible

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

[Although] I have many [things] to write to you, I do not want [to do so] by means of paper and ink, but I hope to be with you and to speak {face to face}, so that your joy may be complete.

I have many things to write to you, but I do not want to write to you by means of ink and pen.