BG 1.12

Then Bhīṣma, the great valiant grandsire of the Kuru dynasty, the grandfather of the fighters, blew his conchshell very loudly, making a sound like the roar of a lion, giving Duryodhana joy.

1.12. Generating joy in him, the powerful paternal grandfather (Bhisma), the seniormost among the Kurus, roared highly a lion-roar and blew his conchshell.

1.12 Then to enliven his spirits, the brave Grandfather Bheeshma, eldest of the Kuru-clan, blew his conch, till it sounded like a lion's roar.

1.12 1.29 Sri Abhinavgupta did not comment upon this sloka.

1.1 - 1.19 Dhrtarastra said - Sanjaya said Duryodhana, after viewing the forces of Pandavas protected by Bhima, and his own forces protected by Bhisma conveyed his views thus to Drona, his teacher, about the adeacy of Bhima's forces for conering the Kaurava forces and the inadeacy of his own forces for victory against the Pandava forces. He was grief-stricken within. Observing his (Duryodhana's) despondecny, Bhisma, in order to cheer him, roared like a lion, and then blowing his conch, made his side sound their conchs and kettle-drums, which made an uproar as a sign of victory. Then, having heard that great tumult, Arjuna and Sri Krsna the Lord of all lords, who was acting as the charioteer of Arjuna, sitting in their great chariot which was powerful enough to coner the three worlds; blew their divine conchs Srimad Pancajanya and Devadatta. Then, both Yudhisthira and Bhima blew their respective conchs separately. That tumult rent asunder the hearts of your sons, led by Duryodhana. The sons of Dhrtarastra then thought, 'Our cause is almost lost now itself.' So said Sanjaya to Dhrtarastra who was longing for their victory. Sanjaya said to Dhrtarastra: Then, seeing the Kauravas, who were ready for battle, Arjuna, who had Hanuman, noted for his exploit of burning Lanka, as the emblem on his flag on his chariot, directed his charioteer Sri Krsna, the Supreme Lord-who is overcome by parental love for those who take shelter in Him who is the treasure-house of knowledge, power, lordship, energy, potency and splendour, whose sportive delight brings about the origin, sustentation and dissolution of the entire cosmos at His will, who is the Lord of the senses, who controls in all ways the senses inner and outer of all, superior and inferior - by saying, 'Station my chariot in an appropriate place in order that I may see exactly my enemies who are eager for battle.'

1.12 Sri Sankaracharya did not comment on this sloka. The commentary starts from 2.10.

1.12 Then the valiant grandsire Bhisma, seniormost of the Kuru clan, roaring like a lion, blew his conch with a view to cheer up Duryodhana.

1.12 The valiant grandfather, the eldest of the Kurus, loudly sounding a lion-roar, blew the conch to raise his (Duryodhana's) spirits.