Bhagavad Gita 13.5

ऋषिभिर्बहुधा गीतं छन्दोभिर्विविधै: पृथक्करण |
ब्रह्मसूत्रपादैश्चैव कल्याणमद्भिर्विनिश्चितै:

Translation

Great sages have sung the truth about the field and the knower of the field in manifold ways. It has been stated in various Vedic hymns, and especially revealed in the Brahma Sūtra, with sound logic and conclusive evidence.