"Much to you dwelling in this mountain": Much reward has accrued to you by dwelling in this mountain: Upon it you accepted the Torah upon yourselves, I appointed for you seventy elders, officers of thousands, officers of hundreds, officers of fifties, and officers of tens, I made for you the mishkan and its vessels — You benefited greatly by your dwelling in this mountain!
Alternately - dwelling at this mountain is bad for you.
Turn, pick yourselves up and come - idleness is bad [as well]. End of section.