Bhagavad Gita Chapter 18, Verse 78

यत्र योगेश्वरः कृष्णो यत्र पार्थो धनुर्धरः | तत्र श्रीर्विजयो भूतिः ध्रुवा नीतिर्मतिर्मम ||

yatra yogeśvaraḥ kṛṣṇo yatra pārtho dhanurdharaḥ tatra śrīr vijayo bhūtiḥ dhruvā nītir matir mama

Where there is the Lord of yoga, Krishna, and where there is Partha, the wielder of the bow, there are prosperity, victory, opulence, and steady righteousness. Such is my opinion.

Sanjaya gives the final conclusion of the Bhagavad Gita. 'Yatra yogeśvaraḥ kṛṣṇo yatra pārtho dhanurdharaḥ'—where (yatra) there is the Lord of yoga (yogeśvaraḥ), Krishna (kṛṣṇaḥ), and where (yatra) there is Partha (pārthaḥ), the wielder of the bow (dhanurdharaḥ). 'Tatra śrīr vijayo bhūtiḥ dhruvā nītir matir mama'—there (tatra) are prosperity (śrīḥ), victory (vijayaḥ), opulence (bhūtiḥ), and steady (dhruvā) righteousness (nītiḥ). Such is my opinion (matiḥ mama). This is the famous conclusion of the Gita: wherever Krishna (the Lord of yoga) and Arjuna (the wielder of the bow, representing the devotee) are together, there is prosperity, victory, opulence, and steady righteousness. This means: wherever the Supreme is present and where there is a devotee ready to act according to the Supreme's instruction, there is success, prosperity, and righteousness. This is the assurance: with Krishna and Arjuna together, victory is certain.