Valmiki Ramayana Aranya Kanda Sarga 61 Shloka 24
Original Shlokaप्राप्स्यसि त्वं महाप्राज्ञ मैथिलीं जनकात्मजाम्।।3.61.24।। यथा विष्णुर्महाबाहुर्बलिं बद्ध्वा महीमिमाम्।
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महाप्राज्ञ O wise sire, त्वम् you, जनकात्मजाम् daughter of Janaka, मैथिलीम् princess from Mithila, महाबाहुः one with long arms, विष्णुः Visnu, बलिम् Bali, बद्ध्वा after binding, इमाम् this, महीं यथा earned this earth, प्राप्स्यसि you will attain.
O longarmed brother O wise sire just as Visnu obtained the earth by binding Bali you will obtain Sita certainly.