Bhagavad Gita

Chapter 18: Mokṣa-sannyāsa-yoga: – Liberation, Renunciation and the Supreme SecretConclusion

ओं तत्सदिति श्रीमद्भगवद्गीतासूपनिषत्सु ब्रह्मविद्यायां योगशास्त्रे श्रीकृष्णार्जुनसंवादे मोक्षसन्न्यासयोगो नाम अष्टादशोऽध्याय: ।

oṃ tat-sad-iti śrīmad-bhagavad-
gītāsūpaniṣatsu brahma-vidyāyāṃ yoga-
śāstre śrīkṛṣṇārjuna-saṃvāde mokṣa-
sannyāsa-yogo nāma aṣṭādaśo’dhyāya:

Om – the symbol of Brahman, tat – that singular Reality (Brahman), sat – the ever abiding presence (Brahman).

Thus ends the eighteenth chapter entitled Mokṣa-sannyāsa Yoga, during the Srikrishna-Arjuna dialogue in Śrīmad Bhagavad Gita, constituting Yoga-śāstra, which falls within Brahmavidya as presented in the Vedic Upanishads.