What are the implications of "Vat'chas aleihem ha'Aretz"?
Ramban and Seforno: Refer to 16:30:1:5***.
What does the Torah mean when it writes "va'Yovdu mi'Toch ha'Kahal"?
Ramban #1: They disappeared before the eyes of the congregation; one moment they were standing there, the next moment they were gone, leaving no sign of where they had just been standing.
Raman #2 (citing Ibn Ezra): They perished together with their children, who should have replaced them.