1)
Why does it say "Bnei Reuven Bechor Yisrael"? Verse 1 already said so?
1.
'Rashi': It begins again from the beginning [Radak - because it interrupted].
Why does it say "Bnei Reuven Bechor Yisrael"? Verse 1 already said so?
'Rashi': It begins again from the beginning [Radak - because it interrupted].