Ramayana
ततः सर्वे महात्मानः सहस्राक्षपुरोगमाः । तदारण्यमुपाक्रामन्यत्र वृत्रो महासुरः ॥ 7-85-10 ॥
Then all those great-souled ones, with the thousand-eyed one at their head, advanced upon that forest where Vritra, the mighty demon, dwelt.
english translation