Valmiki Ramayana Aranya Kanda Sarga 13 Shloka 4
Original Shlokaयथैषा रमते राम इह सीता तथा कुरु। दुष्करं कृतवत्येषा वने त्वामनुगच्छती।।3.13.4।।
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राम O Rama, इह here, यथा in whatever manner, रमते she feels like enjoying, तथा like that, कुरु do, एषा this lady, वने in this forest, त्वाम् you, अनुगच्छती came following, दुष्करम् difficult, कृतवती she has done.
O Rama, help Sita enjoy herself in whatever manner she likes. By following you into the forest, she has accomplished the most difficult task৷৷