Valmiki Ramayana Ayodhya Kanda Sarga 71 Shloka 25
Original Shlokaउद्यानानि पुरा भान्ति मत्तप्रमुदितानि च।।2.71.25।। जनानां रतिसंयोगेष्वत्यन्तगुणवन्ति च।
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पुरा earlier, उद्यानानि gardens, मत्तप्रमुदितानि च very melodiously singing, जनानाम् for people, रतिसंयोगेषु lovers for their pleasures, अत्यन्तगुणवन्ति च very appropriate, भान्ति would be.
Earlier the gardens used to reverberate with passionate songs of birds--places appropriate for lovers seeking pleasures.