1)
What do we learn from "v'Imahen Heiman vi'Ydusun Chatzotzeros"?
1.
Redak: There were trumpets with Heiman and Yedusun. The pronoun precedes its explanation (Imahem - with Heiman and Yedusun), like "va'Tir'ehu Es ha'Yeled."
2)
What do we learn from "u'Vnei Yedisun la'Sha'ar"?
1.
'Rashi': This is like l'Sho'arim. In the 40th year of Malchus Beis David, they made them the head singers - "li'Ydusun Bnei Yedusun... Al Hodos v'Hallel la'Shem" (25:3).
