Valmiki Ramayana Yuddha Kanda Sarga 129 Shloka 48
Original Shlokaउद्योजयिष्यन्नुद्योगंदध्रेकामंवधेमनः ।।6.129.48।। जिघांसुरिवलोकान्तेसर्वान्लोकान्विभावसुः ।
1 source checked for this shloka
उद्योगम् war effort, उद्योजयिष्यन् to win war, लोकान्ते at the end of dissolution of the world, सर्वान् all, लोकान् worlds, जिघांसुः to conquest, विभावसुःइव like the destruction of the worlds, लङ्कावधे for the destruction of Lanka, मनः mind, दध्रे to burn
"Rama made war efforts to win the war for the destruction of Lanka just as fire burns at the dissolution of the worlds and to conquer Ravana."