וַיִּשְׁחַט֩ מֶ֨לֶךְ בָּבֶ֜ל אֶת־בְּנֵ֧י צִדְקִיָּ֛הוּ בְּרִבְלָ֖ה לְעֵינָ֑יו וְאֵת֙ כָּל־חֹרֵ֣י יְהוּדָ֔ה שָׁחַ֖ט מֶ֥לֶךְ בָּבֶֽל׃
Then the king of Babylon slew the sons of Zedekiah in Riblah before his eyes;
Read halakhic rulings (Jewish law) on Jeremiah 39:6: and classical halakhic sources.