Valmiki Ramayana Kishkindha Kanda Sarga 18 Shloka 6

सशैलवनकानना including mountains, groves and forests, इयम् this, भूमिः earth, मृगपक्षिमनुष्याणाम् of animals, birds and humans, निग्रहप्रग्रहावपि punishing and rewarding also, इक्ष्वाकूणाम् bequeathed to Ikshvaku race.

'This earth including mountains, groves and forests, animals, birds and humans belongs to the Ikshvaku kings.The right of purnishment and reward also vests with them.