1)
Why does it say "ha'Rosh Achi'ezer v'Yo'ash"?
1.
Malbim: There were 23 who came to David. Achi'ezer and Yo'ash were each Sarim (judges or leaders) over 10.
Why does it say "ha'Rosh Achi'ezer v'Yo'ash"?
Malbim: There were 23 who came to David. Achi'ezer and Yo'ash were each Sarim (judges or leaders) over 10.