Valmiki Ramayana Sundara Kanda Sarga 57 Shloka 21
Original Shlokaनिशम्य नदतो नादं वानरास्ते समन्ततः।।5.57.21।। बभूवुरुत्सुकास्सर्वे सुहृद्धर्शनकाङ्क्षिणः।
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समन्ततः together, सर्वे all of them, ते वानराः those vanaras, नदतः chattering, नादम् voice, निशम्य hearing, सुहृद्धर्शनकाङ्क्षिणः waiting to see their friend, उत्सुकाः eager, बभूवुः became.
On hearing the loud voice of Hanuman, all the vanaras were longing to see their friend.