1)
Who is the Ben Chayil?
1.
Rashi: Even if the one who hears is valiant [his heart will melt, and he will cease to support you].
2.
Radak: Achitofel. Chushai praised him, lest it seem that he speaks to his detriment. Even Achitofel, who has the heart of a lion, when he hears that his men were defeated, his heart will melt.
3.
Abarvenel: Some say that it refers to David 1 . Will his heart melt due to Achitofel?!
1
Abarvenel: It is better to explains that it refers to Achitofel, who was mentioned (verse 7).