Then Jeremiah called Baruch the son of Neriah: and Baruch wrote from the mouth of Jeremiah all the words of the LORD, which he had spoken unto him, upon a roll of a book.
Ver. 4. Then Jeremiah calIed Baruch, … and a Baruch wrote from the mouth.] Dictantis ab ore pependit. Jeremiah, it seemeth, had either not written his prophecies, or not so legibly, or in loose papers only; now he hath them fair written out into a book, making the same use of Baruch as afterward Paul did of Tertius, Rom 16:22 who himself wrote no very good hand, as some have gathered from Galatians 6:11; See Trapp on " Gal 6:11 "
a Baruch iste notarius et diaconus Ieremiae, simulque propheta fuit. - Oecolamp.