bought
(1) A sign of Jeremiah's faith in his own predictions of the restoration of Judah (Jeremiah 32:15) for the field was then occupied by the Babylonian army; and
(2) a sign to Judah of that coming restoration.
Related Commentaries of Jeremiah 32:9
Jeremiah 32:9
9 And I bought the field of Hanameel my uncle's son, that was in Anathoth, and weighed him the money, even seventeena shekels of silver.