Shloka 76
तीर्थवंशोपदेशः
Tīrtha-vaṃśa Upadeśa: Instruction on the Fruits of Sacred Waters
शस्त्रविक्रयिकाश्वैव कर्तारश्न युधिष्ठिर । शल्यानां धनुषां चैव ते वै निरयगामिन:,राजा युधिष्लिर! जो (ब्राह्मण) हथियार बेचते और धनुष-बाण आदि शणस्त्रोंको बनाते हैं, वे नरकगामी होते हैं
śastravikrayikāś caiva kartāraś ca yudhiṣṭhira | śalyānāṁ dhanuṣāṁ caiva te vai nirayagāminaḥ ||
भीष्म उवाच—युधिष्ठिर, शस्त्रविक्रयिकाश्चैव शस्त्रकर्तार एव च; शल्यानां धनुषां चैव, ते वै निरयगामिनः।
भीष्म उवाच
Educational Q&A
Earning by selling or manufacturing weapons is condemned as adharmic because it supports violence for profit; Bhīṣma states such conduct leads to severe negative consequences (niraya).
In the Anuśāsana Parva, Bhīṣma is instructing King Yudhiṣṭhira on dharma and proper conduct; here he specifically addresses occupations and warns against livelihoods connected to weapon trade and production.