Valmiki Ramayana Ayodhya Kanda Sarga 31 Shloka 16
Original Shlokaएवं मम च ते भक्तिर्भविष्यति सुदर्शिता। धर्मज्ञ गुरुपूजायां धर्मश्चाप्यतुलो महान्।।2.31.16।।
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धर्मज्ञ O knower of dharma (duty), एवम् in this way, मम in me, ते your, भक्तिः devotion, सुदर्शिता is welldemonstrated, भविष्यति will become, गुरुपूजायाम् in worshipping the elders, अतुलः unequalled, महान् great, धर्मश्च is virtue also.
If you do this, your devotion to me will be amply demonstrated. Service to the elders, O dutiful one, is a virtue, great and unequalled.