Valmiki Ramayana Bala Kanda Sarga 13 Shloka 23
Original Shlokaतथा केकयराजानं वृद्धं परमधार्मिकम्। श्वशुरं राजसिंहस्य सपुत्रं त्वमिहानय।।1.13.23।।
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तथा then, परमधार्मिकम् very righteous, राजसिंहस्य our king Dasaratha's, श्वशुरम् fatherinlaw, वृद्धम् aged, केकयराजानम् king of Kekaya, सपुत्रम् along with his sons, त्वम् you, इह here, आनय bring.
Likewise bring here the aged and very righteous king of Kekaya along with his sons. He is fatherinlaw to this lion among kings (Dasaratha).