Valmiki Ramayana Kishkindha Kanda Sarga 50 Shloka 18
Original Shlokaनिशाम्य तस्मात् शिंहांश्च तांस्तांश्च मृगपक्ष्णिः।।4.50.18।। प्रविष्टा हरिशार्दूला बिलं तिमिरसंवृतम्।
1 source checked for this shloka
हरिशार्दूलाः tigers among monkeys, तस्मात् from, सिंहांश्च lions, तांस्तान् various types of, मृगपक्ष्णिः beasts and birds, निशाम्य after hearing their sounds, तिमिरसंवृतम् full of darkness, बिलम् cave, प्रविष्टाः entered.
The tigers among the monkeys entered the dark cave reverberating with the sounds of lions, beasts and birds.