Adhyāya 166: Kṛtaghna-doṣa (कृतघ्नदोषः) — the fault of ingratitude and the limits of expiation
न नर्मयुक्तमनृतं हिनस्ति न स्त्रीषु राजन् न विवाहकाले | न गुर्वर्थ नात्मनो जीवितार्थे पज्चानृतान्याहुरपातकानि
na narmayuktam anṛtaṁ hinasti na strīṣu rājan na vivāhakāle | na gurvarthe nātmano jīvitārthe pañcānṛtāny āhur apātakāni rājan ||
ビーシュマは言った。「王よ、戯れに口にする虚言は害をなさぬ。女に向けて語るときも、婚礼の時も同じである。また師(グル)の利益のため、あるいは己が命を救うために語る虚言も、咎められるべきものとは見なされない。王よ、この五つの場合には、虚言を語っても罪に数えられぬと宣言されている。」
भीष्म उवाच
Truthfulness is a central virtue, yet Bhishma notes limited, context-bound exceptions where speaking an untruth is not treated as sinful: in jest, in certain speech with women, during marriage arrangements, for a teacher’s welfare, and to save one’s life.
In the Śānti Parva’s dharma instruction, Bhishma is advising King Yudhiṣṭhira on ethical conduct, specifically the nuanced rules governing speech and when strict truth-telling may be relaxed without incurring sin.