Bhagavad Gita · 18.74

सञ्जय उवाच।इत्यहं वासुदेवस्य पार्थस्य च महात्मनः।संवादमिममश्रौषमद्भुतं रोमहर्षणम्॥

sañjaya uvācha ity ahaṁ vāsudevasya pārthasya cha mahātmanaḥ saṁvādam imam aśhrauṣham adbhutaṁ roma-harṣhaṇam

Sanjaya said: Thus I have heard this wonderful dialogue between Vasudeva and the great-souled Partha, causing my hair to stand on end.

— Bhagavad Gita 18.74

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)