The Twenty-Second Prophecy of Jeremiah (see book comments for Jeremiah)
Behold: Figure of speech. Asterismos. App-6.
thine uncle: i.e. Shallum, not Hanameel, who was Jeremiah's cousin. See next verse.
my field. Accusative case to Numbers 35:5, this would be within 2,000 cubits of Anathoth.
the right, &c. Reference to Pentateuch (Leviticus 25:24; Leviticus 25:25; Leviticus 25:32). Compare Ruth 4:6.