Valmiki Ramayana Ayodhya Kanda Sarga 45 Shloka 27

निभृताचार ever firm in duty, महीपतनपांसुलैः soiled with the dust fallen on the ground, हंसशुक्लशिरोरुहैः having hairs white like the (plumes of a) swan, नः our, शिरोभिः with our heads, याचितः beg of you, निवर्तस्व you may return.

O Rama, you are firm in your duty.We beseech you, our heads bowed with swanwhite hair and soiled with dust, to return to Ayodhya.