B.G 4.42
तस्मादज्ञानसम्भूतं हृत्स्थं ज्ञानासिनाऽत्मनः। छित्त्वैनं संशयं योगमातिष्ठोत्तिष्ठ भारत ॥४२॥
tasmādajñānasambhūtaṁ hr̥tsthaṁ jñānāsinā'tmanaḥ। chittvainaṁ saṁśayaṁ yogamātiṣṭhottiṣṭha bhārata ॥42॥
O Arjuna, therefore, cut off this doubt and wrong knowledge that has engulfed your heart with the sword of knowledge. Situating yourself in Yoga, arise (to fight).
Gīta Tātparya 4.42
Thus ends the Fourth Chapter in the Bhagavad Gita Purport authored by the revered Ānandatīrtha Bhagavatpāda.
॥ ओं तत्सदिति श्रीमद्भगवद्गीतासु उपनिषत्सु ब्रह्मविद्यायां योगशास्त्रे श्रीकृष्णार्जुनसंवादे ज्ञानयोगो नाम चतुर्थोध्यायः ॥
॥ oṁ tatsaditi śrīmadbhagavadgītāsu upaniṣatsu brahmavidyāyāṁ yogaśāstre śrīkr̥ṣṇārjunasaṁvāde jñānayogo nāma caturthodhyāyaḥ ॥
"Om Tat Sat - Thus in the Śrīmad Bhagavad Gītā, in the Upaniṣads, in the science of Brahman, in the Yoga scripture, in the dialogue between Śrī Kṛṣṇa and Arjuna, the fourth chapter called 'Jñāna Yoga', i.e. 'The Yoga of Knowledge' concludes."