SB 10.46.25
tala-trayam maha-saram
dhanur yastim ivebha-rat
babhañjaikena hastena
saptaham adadhad girim
Translation:
With the ease of a royal elephant breaking a stick, Krsna broke a powerful, giant bow three talas long. He also held a mountain aloft for seven days with just one hand.
Purport:
According to Acarya Visvanatha, a tala (“palm tree”) is a measurement of about sixty hastas, or ninety feet. Thus the great bow Krsna broke was two hundred seventy feet long.