Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 20
Sanskrit:
अथ तान्दुरभिप्रायान् विलोक्य बलकेशवौ । क्रुद्धौ धन्वन आदाय शकले तांश्च जघ्नतु: ॥ २० ॥
ITRANS:
atha tān durabhiprāyānvilokya bala-keśavaukruddhau dhanvana ādāyaśakale tāṁś ca jaghnatuḥ
Translation:
Seeing the guards coming upon Them with evil intent, Balarāma and Keśava took up the two halves of the bow and began striking them down.