Valmiki Ramayana Kishkindha Kanda Sarga 33 Shloka 28

अथ then, प्लवगाधिपः lord of monkeys, सः सुग्रीवः that Sugriva, तेन by that, चापस्वनेन sound of the bow, आगमनम् arrival, विज्ञाय sensing, त्रस्तः feared, वरासनात् from the throne, सञ्चचाल alighted at once.

Then, sensing the arrival of Lakshmana, by the sound of his bow string, Sugriva the lord of vanaras, alighted at once from the throne.