Valmiki Ramayana Ayodhya Kanda Sarga 106 Shloka 19

महाप्राज्ञ O sagacious one, येन by whom, प्रजानाम् of the subjects', परिपालनम् governance, शक्यम् is possible, एषः this one, क्षत्रियस्य kshatriya's, अभिषेचनम् to be crowned, प्रथमः primary, धर्मः हि duty indeed.

O sagacious one, the primary duty of a kshatriya is to be crowned. This enables him to rule his subjects.