Valmiki Ramayana Ayodhya Kanda Sarga 117 Shloka 3
Original Shlokaस्कन्धावारनिवेशेन तेन तस्य महात्मनः। हयहस्तिकरीषैश्च उपमर्दः कृतो भृशम्।।2.117.3।।
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महात्मनः magnanimous, तस्य Bharata's, तेन by that, स्कन्धावारनिवेशेन with the encampment of army, हयहस्तिकरीषैश्च with the dung of horses and elephants, भृशम् exceedingly, उपमर्थः dirty, कृतः has been made.
Due to the encampment of the army of the magnanimous Bharata (here), this place has been filled with the dung of horses and elephants and made exceedingly dirty.