Valmiki Ramayana Kishkindha Kanda Sarga 37 Shloka 19

वानराः monkeys, मृत्युकालोपमस्य like god of death , राजराजस्य of king's, सुग्रीवस्य Sugriva's, आज्ञाम् command, श्रुत्वा on hearing, सुग्रीवभयदर्शिनः foreseeing fear from Sugriva, आययुः came.

In response to the command of the king, who was like death to them, the monkeys came at once, driven by fear from Sugriva.