Valmiki Ramayana Kishkindha Kanda Sarga 31 Shloka 7
Original Shlokaनेदमत्र त्वया ग्राह्यं साधुवृत्तेन लक्ष्मण। तां प्रीतिमनुवर्तस्व पूर्ववृत्तं च सङ्गतम्4.31.7।।
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लक्ष्मण Lakshmana, साधुवृत्तेन with good conduct, त्वया by you, अत्र here, इदम् thus, ग्राह्यम् keeping, ताम् that, प्रीतिम् affection, पूर्ववृत्तम् as earlier, सङ्गतं च also friendship, अनुवर्तस्व follow.
'O Lakshmana with your good conduct you should not do so. Keeping in view the affectionate friendship extended (by Sugriva) earlier, be friendly.