Bhagavad Gita 18.74
Sanjaya said: "I heard this rare, wonderful, and soul-stirring discourse between Lord Shri Krishna and the great-souled Arjuna.
सञ्जय उवाचइत्यहं वासुदेवस्य पार्थस्य च महात्मनः।संवादमिममश्रौषमद्भुतं रोमहर्षणम्॥sañjaya uvācaityahaṃ vāsudevasya pārthasya ca mahātmanaḥ|saṃvādamimamaśrauṣamadbhutaṃ romaharṣaṇam||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).