Jeremiah 36:4

36:4 So Jeremiah summoned Baruch son of Neriah. Then Jeremiah dictated to Baruch everything the Lord had told him to say and Baruch wrote it all down in a scroll.

Jeremiah 36:18

36:18 Baruch answered, “Yes, they came from his own mouth. He dictated all these words to me and I wrote them down in ink on this scroll.”