Bhagavad Gita 7.11
I am the strength of the strong, those who are free from attachment and desire; and, O Arjuna, I am the desire for righteousness.
बलं बलवतां चाहं कामरागविवर्जितम्।
धर्माविरुद्धो भूतेषु कामोऽस्मि भरतर्षभ॥balaṃ balavatāṃ cāhaṃ kāmarāgavivarjitam|
dharmāviruddho bhūteṣu kāmo'smi bharatarṣabha||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).