Kautilya's Arthashastra 14.3.32

14.3.32

etenaiva kalpena śvāvidhaḥ śalyakaṃ trikālaṃ triśvetam asaṃkīrṇa ādahane nikhānayet //

Following the same procedure, one should separately bury in cremation grounds three white and three black dart-like hairs (salyaka) of a porcupine. When, having on the next fourteenth day taken them out, one throws them together with the ashes of a burnt corpse, chanting the above mantra, the whole animal life in that place falls into deep slumber.