Bhagavad Gita: Chapter 1, Verse 12

तस्य सञ्जनयन्हर्षं कुरुवृद्धः पितामहः ।
सिंहनादं विनद्योच्चैः शङ्खं दध्मौ प्रतापवान् ॥ १-१२॥

tasya sañjanayan harṣaṃ kuruvṛddhaḥ pitāmahah
siṃhanādaṃ vinadyocchaiḥ śaṅkhaṃ dadhmau pratāpavān 1.12

Then, the great valiant grandsire of the Kuru Dynasty, the glorious patriarch Bhisma blew his conch shell very loudly like a roaring lion, giving joy to Duryodhana.