Valmiki Ramayana Yuddha Kanda Sarga 33 Shloka 3
Original Shlokaसाहितत्रकृतामित्रंसीतयारक्ष्यमाणया । रक्षन्तीरावणादिष्टासानुक्रोशादृढव्रता ।।6.33.3।।
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रावणादिष्टा by Ravana's order, रक्षन्ती protected, सानुक्रोशा most compassionate, दृढव्रता determined, सा that, तत्र there, रक्ष्यमाणया protecting, सीतया Sita, मित्रम् friendship, कृताहि was doing (protecting).
Most compassionate Saarana, determined to protect was friendly with Sita while she was ordered for protecting her by Ravana.