Valmiki Ramayana Bala Kanda Sarga 72 Shloka 15
Original Shlokaपरो धर्म: कृतो मह्यं शिष्योऽस्मिभवतो सदा। इमान्यासनमुख्यानि आसातां मुनिपुङ्गवौ।।1.72.15।।
1 source checked for this shloka
मह्यम् for me, पर: supreme, धर्म: religious merit, कृत: has been done, सदा always, भवतो: for both of you, शिष्य: अस्मि I am a desciple, मुनिपुङ्गवौ eninent ascestics, इमानि these, आसनमुख्यानि best of thrones, आसाताम् occupy.
"You have earned me a great religious merit. I shall be always your disciple O Eminent ascestics, occupy these important seats".