Gaṅgā-māhātmya: Siddha–Śilavṛtti-saṃvāda and Gaṅgā-stava (गङ्गामाहात्म्यं—सिद्ध-शिलवृत्ति-संवादः)
अधर्मनिरतो मूढो मिथ्या यो वै द्विजातिषु । दद्यान्मर्मातिगं शोकं त॑ विद्याद् ब्रद्मघातिनम्
adharmanirato mūḍho mithyā yo vai dvijātiṣu | dadyān marmātigaṃ śokaṃ taṃ vidyād brahmaghātinam ||
ভীষ্ম বললেন—যে মূঢ় ব্যক্তি অধর্মে আসক্ত হয়ে দ্বিজদের বিষয়ে মিথ্যা অপবাদ রটায় এবং মর্মভেদী শোক দান করে, তাকে ব্রহ্মঘাতী বলে জানবে।
भीष्म उवाच
False and malicious speech directed at the twice-born—especially speech that causes deep, piercing anguish—is treated as a grave moral offense, comparable in severity to brahmahatyā (the sin of killing a brāhmaṇa).
In Anuśāsana Parva, Bhīṣma continues his instruction on dharma, emphasizing ethical restraint in conduct and speech; here he warns that slander and harmful falsehood toward the dvijas brings extreme culpability.