Chapter 13: Kshetra-kshetrajna-vibhaga-yoga – Distinction between Object Field and its Knower: Conclusion
ओं तत्सदिति श्रीमद्भगवद्गीतासूपनिषत्सु ब्रह्मविद्यायां योगशास्त्रे श्रीकृष्णार्जुनसंवादे क्षेत्रक्षेत्रज्ञविभागयोगो नाम त्रयोदशोऽध्याय:।
oṃ tat-sad-iti śrīmad-bhagavad-gītāsūpaniṣatsu brahma-vidyāyāṃ
yoga-śāstre śrīkṛṣṇārjuna-saṃvāde kṣetra-kṣetrajña-vibhāga-yogo nāma trayodaśo’dhyāya:
Om – the symbol of Brahman, tat – that singular Reality (Brahman), sat – the ever abiding presence (Brahman).
Thus ends the thirteenth chapter entitled Kṣetra-kṣetrajña-vibhāga Yoga, during the Srikrishna-Arjuna dialogue in Śrīmad Bhagavad Gita, constituting Yoga-śāstra, which falls within Brahmavidya as presented in the Vedic Upanishads.