Valmiki Ramayana Ayodhya Kanda Sarga 118 Shloka 17
Original Shlokaसा त्वेवमुक्ता धर्मज्ञा तया प्रीततराऽभवत्। सफलं च प्रहर्षं ते हन्त सीते करोम्यहम्।।2.118.17।।
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धर्मज्ञा knower of righteous ways, सा she (Anasuya), तया by Sita, एवम् in this way, उक्ता having been addressed, प्रीततरा अभवत् she was immensely pleased, सीते O Sita, हन्त what a joy, प्रहर्षम् my delight, ते to you, सफलम् fruitful, अहम् I, करोमि shall do.
When Sita said so, Anasuya who knew her righteous duty was immensely pleased. and replied, 'What a joy I shall make the words you have spoken come true'.