Shloka 17
Chapter 19: Prativyūha of the Pāṇḍavas — Vajra (Acala) Formation and Dawn Omens
एवमुकक््त्वा महाबाहुस्तथा चक्रे धनंजय: । व्यूह्व तानि बलान्याशु प्रययौं फाल्गुनस्तथा,महाबाहु अर्जुनने ऐसा कहकर उसी तरह किया; अपनी सब सेनाओंका शीघ्र ही व्यूह बनाया और रणके लिये प्रस्थान किया
evam uktvā mahābāhus tathā cakre dhanañjayaḥ | vyūhya tāni balāny āśu prayayau phālgunaḥ tathā ||
サञ्जयは語った。そう言い終えると、強き腕をもつダナञ्जヤ（アルジュナ）はそのとおりに行った。彼は諸軍をたちまち戦陣（ヴ्यूーハ）に整え、ファールグナは戦いへと進み出た。助言に即応し、正法の戦の要請に応える断固たる備えを示したのである。
संजय उवाच
Educational Q&A
The verse highlights disciplined action: once a decision aligned with duty is made, one should execute it promptly and effectively—here shown through Arjuna’s swift organization of forces and readiness to engage in a dharma-governed battle.
Sañjaya reports to Dhṛtarāṣṭra that Arjuna, after speaking (in response to prior counsel or instruction), immediately arranges the troops into a proper battle formation (vyūha) and marches out to the battlefield.