Valmiki Ramayana Sundara Kanda Sarga 58 Shloka 133
Original Shlokaरामदूतं च मां विद्धि सुग्रीवसचिवं कपिम्। सोऽहं दूत्येन रामस्य त्वत्सकाशमिहागतः।।5.58.133।।
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कपिम् I am a vanara, माम् I am, रामदूतम् messenger of Rama, सुग्रीवसचिवम् minister of Sugriva, विद्धि you may know, सः अहम् that I, रामस्य Rama's, दूत्येन as messenger, त्वत्सकाशम् to convey that message, इह here, आगतः came.
'I am a vanara, a messenger of Rama and minister of Sugriva.You may know that I have come here to convey the message of Rama to you.