गुरूनहत्वा हि महानुभावान् श्रेयो भोक्तुं भैक्ष्यमपीह लोके। हत्वार्थकामांस्तु गुरूनिहैव भुञ्जीय भोगान् रुधिरप्रदिग्धान् ॥

gurūnahatvā hi mahānubhāvān śhreyo bhoktuṁ bhaikṣhyamapīha loke hatvārtha-kāmāṁstu gurūnihaiva bhuñjīya bhogān rudhira-pradigdhān

Better in this world to eat even the beggar's crust than to slay these most noble Gurus. Slaying these Gurus, our well-wishers, I should taste of blood-besprinkled feasts.

In plain words: Arjuna says it would be better to live as a beggar than to kill his noble teachers, who wish him well. Any riches he won by killing them would feel stained with their blood.