The Mokṣa-Dharma-Parvan of the Mahābhārata
This discussion forms the Mokṣa-dharma-parvan - part of Book 12 (the Śānti-parvan) of the Mahābhārata. The subjects discussed are wide ranging but the principal focus is on renunciation of the world, the philosophy of Sāṁkhya, early Vaiṣṇava theism, and probably the earliest teachings we have on the techniques of meditational yoga.