1)
What is the meaning of "va'Ya'al b'Raglav"?
1.
Rashi, Radak: [He brought] with him.
2.
Malbim #1: [He brought] due to himself, and not due to Devorah.
3.
Malbim #2: He went by foot; he did not have a horse or chariot against Sisera's 900 iron chariots.
