What does Jeremiah 32:8 mean?

Sure enough, just as God said, Hanamel came to me in the courtyard and asked me to buy his field at Anathoth, since I had the right to redeem it. I knew then that this was really God’s message. Jeremiah 32:8 - Modern Text Bible

(When Hanamel shows up, Jeremiah realizes God’s word is coming true in real time.)