Valmiki Ramayana Kishkindha Kanda Sarga 14 Shloka 3

परिवारैः with companions, परिवृतः surrounded, ततः then, नादैः with sounds, अम्बरम् sky, भिन्दन्निव as if piercing through, वायुवेगपुरःसरः moving with the speed of wind, गर्जन् while roaring, महामेघ इव like a huge cloud, घोरम् terrific, निनदम् sound, कृत्वा having produced, युद्धाय for the combat, अह्वयत् challenged.

Sugriva, surrounded by his companions, raised his voice as if piercing the sky, roaring like a huge thundering cloud, challenging Vali to a duel.