Bhagavad Gita · 18.78

यत्र योगेश्वरः कृष्णो यत्र पार्थो धनुर्धरः।तत्र श्रीर्विजयो भूतिर्ध्रुवा नीतिर्मतिर्मम॥

yatra yogeśhvaraḥ kṛiṣhṇo yatra pārtho dhanur-dharaḥ tatra śhrīr vijayo bhūtir dhruvā nītir matir mama

Wherever there is Krishna, the Lord of Yoga, and wherever there is Arjuna, the wielder of the bow, there will certainly be fortune, victory, prosperity, and righteousness. This is my conviction.

— Bhagavad Gita 18.78

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)