Valmiki Ramayana Yuddha Kanda Sarga 55 Shloka 20

तेन by that, रेणुना form, ध्वजः posts, नददृशे not visible, पताकावा fags also, न, चर्मवा not shield, तुरगोऽपिवा not horses, आयुधम् not weapons, स्यन्दनोवापि even chariots could not be seen.

By the dust raised, the posts, flags, shields and not even horses, weapons and chariots were visible.