Bhagavadgītā-4comm with the commentaries · Chapter 144

Baladeva :
gītārthān iha saṅgṛhṇan harir aṣṭādaśe 'khilān |
bhaktes tatra prapatteś ca so 'bravīd atigopyatām ||
sarva-karmāṇi manasā sannyasyāste sukhaṃ vaśī | (Gītā 5.13) ity ādau sannyāsa-śabdena kim uktam -- tyaktvā karma-phalāsaṅgaṃ (Gītā 4.20) ityādau tyāga-śabdena ca kim uktaṃ bhagavatā tatra sandihāno 'rjunaḥ pṛcchati sannyāsasyeti | sannyāsa-tyāga-śabdau śaila-taru-śabdāv iva vijātīyārthau kiṃ vā kuru-pāṇḍava-śabdāv iva sajātīyārthau | yady ādyas tarhi sannyāsasya tyāgasya ca tattvaṃ pṛthag-veditum icchāmi | yadyantas tarhi tatrāvāntaropādhi-mātraṃ bhedakaṃ bhāvi, tac ca veditum icchāmi | he mahābāho kṛṣṇa hṛṣīkeśeti dhī-vṛtti-prerakatvāt tvam eva mat-sandeham utpādayasi | keśi-nisūdaneti tvaṃ mat-sandehaṃ keśinam iva vināśayeti

BhG 18.2
śrībhagavān uvāca
kāmyānāṃ karmaṇāṃ nyāsaṃ saṃnyāsaṃ kavayo viduḥ |
sarvakarmaphalatyāgaṃ prāhus tyāgaṃ vicakṣaṇāḥ