Valmiki Ramayana Sundara Kanda Sarga 35 Shloka 11
Original Shlokaरामो भामिनि लोकस्य चातुर्वर्ण्यस्य रक्षिता। मर्यादानां च लोकस्य कर्ता कारयिता च सः।।5.35.11।।
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भामिनि O beautiful lady, रामः Rama, लोकस्य world's, चातुर्वर्ण्यस्य of the four classes of society, रक्षिता protector, सः he, लोकानाम् of all the worlds, मर्यादानाम् code and conduct, कर्ता maker, कारयिताचैव will make others follow.
"O beautiful lady Rama is a protector of the four classes of society (Brahmana, Kshatriya, Vaisya and Sudra) in the world. He follows codes of conduct and makes others follow them.