Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 25

Sanskrit:

तालत्रयं महासारं धनुर्यष्टिमिवेभराट् ।बभञ्जैकेन हस्तेन सप्ताहमदधाद् गिरिम् ॥ २५ ॥

ITRANS:

tāla-trayaṁ mahā-sāraṁdhanur yaṣṭim ivebha-rāṭbabhañjaikena hastenasaptāham adadhād girim

Translation:

With the ease of a royal elephant breaking a stick, Kṛṣṇa broke a powerful, giant bow three tālas long. He also held a mountain aloft for seven days with just one hand.

Purport:

According to Ācārya Viśvanātha, a tāla (“palm tree”) is a measurement of about sixty hastas, or ninety feet. Thus the great bow Kṛṣṇa broke was two hundred seventy feet long.