Valmiki Ramayana Ayodhya Kanda Sarga 16 Shloka 39
Original Shlokaनूनं नन्दति ते माता कौशल्यामातृनन्दन।।2.16.39।। पश्यन्ती सिद्धयात्रं त्वां पित्र्यं राज्यमवस्थितम्।
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मातृनन्दन O Joy of your mother, (Rama), सिद्धयात्रं whose journey has become fruitful, पित्र्यं राज्यम् the father's kingdom, उपस्थितम् secured, त्वाम् you, पश्यन्ती seeing, ते your, माता mother, कौशल्या Kausalya, नूनम् surely, नन्दति will be delighted.
O Joy of your mother (Rama) on seeing you having successfully acomplished the purpose of your journey (life) by securing your father's kingdom, your mother Kausalya will surely be delighted.