Valmiki Ramayana Bala Kanda Sarga 1 Shloka 70
Original Shlokaततस्सुग्रीववचनाद्धत्वा वालिनमाहवे । सुग्रीवमेव तद्राज्ये राघव: प्रत्यपादयत् ।।1.1.70।।
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राघव: Rama, सुग्रीववचनात् in compliance with the words of Sugriva, वालिनम् Vali, आहवे in the battle, हत्वा having killed, तत: thereafter, तद्राज्ये in that kingdom of Vali, सुग्रीवमेव Sugriva itself, प्रत्यपादयत् proposed (installed).
After he killed Vali in the combat in compliance with the words of Sugriva, Rama installed Sugriva as king.