Verse 2.33
अथ चैत्त्वमिमं धर्म्यं संग्रामं न करिष्यसि। ततः स्वधर्मं कीर्तिं च हित्वा पापमवाप्स्यसि।।2.33।।
atha chet tvam imaṁ dharmyaṁ saṅgrāmaṁ na kariṣhyasi tataḥ sva-dharmaṁ kīrtiṁ cha hitvā pāpam avāpsyasi
Meaning
But if you're not gonna fight this righteous war, then you're gonna be a total scrub, ditching your duty and rep, and racking up major karma debt.
Commentary
Yo, Krishna's reminding Arjuna about his already fire, legendary status. If he ditches this fight, he's gonna lose all that clout. Arjuna's already earned mad respect, like, battling Shiva himself and snagging the Pasupatastra, a total OP celestial weapon. It's a big deal.