Valmiki Ramayana Ayodhya Kanda Sarga 30 Shloka 38
Original Shlokaस मां पिता यथा शास्ति सत्यधर्मपथे स्थितः। तथा वर्तितुमिच्छामि स हि धर्मस्सनातनः।।2.30.38।।
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सत्यधर्मपथे On the path of truth and dharma, स्थितः firmly fixed, सः पिता such father, माम् me, यथा as, शास्ति commands, तथा accordingly, वर्तितुम् to abide by, इच्छामि wish सः that one, सनातनः eternal, धर्मः हि is truth indeed.
My father who follows the path of truth and dharma whatever be his commands, I wish to obey. He is, indeed, dharma eternal.