BHAGAVAD GITA · CHAPTER 13, VERSE 4

Bhagavad Gita 13.4

ऋषिभिर्बहुधा गीतं छन्दोभिर्विविधैः पृथक्। ब्रह्मसूत्रपदैश्चैव हेतुमद्भिर्विनिश्चितैः॥

This knowledge has been sung by sages in various ways, in distinct Vedic hymns, and in logical, conclusive verses of the Brahma Sutras.