1)
What is the meaning of "Neche Raglayim"?
1.
Rashi: His legs were broken.
2)
Why does it mention how Mefivoshes became lame?
1.
Rashi: The Navi tells how kingship ceased from Beis Sha'ul. Sha'ul and three sons died [in war], Ish Boshes was killed, and Yehonason's son became lame (so he could not be a shelter for Malchus Sha'ul). Radak (2) - no heir of the kingship remained. His only other sons were from his concubine Ritzpah!
