This Baruch (as appeareth from Jeremiah 36:4,26) was a scribe, and an attendant upon Jeremiah, and one who wrote things for him, and from his mouth. He made this purchase with all the usual formalities; to make it public, he signed and sealed it before witnesses, and delivered it to Baruch, to keep in the presence of them all, and in the presence of the Jews who casually were in the place when the thing was done.
Related Commentaries of Jeremiah 32:12
Jeremiah 32:12
12 And I gave the evidence of the purchase unto Baruch the son of Neriah, the son of Maaseiah, in the sight of Hanameel mine uncle's son, and in the presence of the witnesses that subscribed the book of the purchase, before all the Jews that sat in the court of the prison.