Valmiki Ramayana Yuddha Kanda Sarga 50 Shloka 25
Original Shlokaअहंतुरावणंहत्वासपुत्रंसहबान्धवम् । मैथिलीमानयिष्यामिशक्रोनष्टामिवश्रियम् ।।6.50.25।।
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अहंतु I also, सपुत्रम् his sons, सहबान्दवम् with the kin, रावणम् Ravana, हत्वा having killed, शक्रः Indra, नष्टाम् loss, श्रियमिव prosperity, मैथिलीम् Mythili also, आनयिष्यामि will bring.
"On killing Ravana and his sons along with his kin, I will on my part also bring Mythili just as Indra recovered his prosperity."