Bhagavad Gita 18.31
The intellect that does not understand what is right and wrong, and what should be done and not done, is under the sway of Passion.
यया धर्ममधर्मं च कार्यं चाकार्यमेव च।अयथावत्प्रजानाति बुद्धिः सा पार्थ राजसी॥yayā dharmamadharmaṃ ca kāryaṃ cākāryameva ca|ayathāvatprajānāti buddhiḥ sā pārtha rājasī||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).