'Ink' in the Bible

For all can see that you are a letter of Christ entrusted to our care, and written not with ink, but with the Spirit of the ever-living God--and not on tablets of stone, but on human hearts as tablets.

I have a great deal to say to you all, but will not write it with paper and ink. Yet I hope to come to see you and speak face to face, so that your happiness may be complete.

I have a great deal to say to you, but I do not wish to go on writing it with ink and pen.