Adhyāya 166: Kṛtaghna-doṣa (कृतघ्नदोषः) — the fault of ingratitude and the limits of expiation
तस्मान्नैवावगहोॉत नैव जातु निपातयेत् । शोणितं यावत: पांसून् संगृह्नीयाद् द्विजक्षतात्
tasmān naivāvagaho'ta naiva jātu nipātayet | śoṇitaṃ yāvataḥ pāṃsūn saṃgṛhnīyād dvijakṣatāt ||
Bhīṣma said: Therefore one should neither plunge into it nor ever cause it to fall. From a brāhmaṇa’s wound, one should gather up the blood along with as much dust as it has touched, so that no further defilement or harm is allowed to spread.
भीष्म उवाच
Bhīṣma lays down a rule of careful restraint and responsibility: do not recklessly enter into or spread a harmful/defiling situation; instead, contain it and remove even secondary contamination (symbolized by collecting blood and the dust it has touched), reflecting a broader ethic of non-harm and meticulous dharmic conduct.
In Śānti Parva’s instruction-setting, Bhīṣma is giving prescriptive guidance on proper conduct. Here he describes how one should respond to a brahmin’s injury: avoid actions that worsen the situation and carefully gather and remove the blood and affected earth, emphasizing containment and respect.