Valmiki Ramayana Yuddha Kanda Sarga 33 Shloka 4
Original Shlokaसाददर्शसखीसीतांसरमानष्टचेतनाम् । उपावृत्त्योत्थितांध्वस्तांबडबामिवपांसुलाम् ।।6.33.4।।
1 source checked for this shloka
सखी friend, सा that, सरमा Saarana, नष्टचेतनाम् lost consciousness, पांसुलाम् dirty ground, उपावृत्त्य enveloped, उत्थिताम् female horse, ध्वस्ताम् covered with, बडबामिव like a female horse, सीताम् Sita, ददर्श saw.
Saarana saw her friend Sita, who had lost consciousness, fully covered by dust by rolling on the dirty ground like a female horse.