Valmiki Ramayana Ayodhya Kanda Sarga 91 Shloka 49

भरद्वाजस्य at Bharadwaja's, शासनात् command, बिल्वाः bilva trees, मार्दङ्गिकाः as drummers, आसन् became, विभीतकाः vibhitaka (palm) trees, शम्याग्राहा as cymbalists, अश्वत्था pipal trees, नर्तकाश्च as dancers, आसन् became.

At the command of Bharadwaja, bilva trees acted as drummers, vibhitaka trees as cymbalists and the pipal trees as dancers.