Valmiki Ramayana Ayodhya Kanda Sarga 42 Shloka 13
Original Shlokaविललाप च दुःखार्तः प्रियं पुत्रमनुस्मरन्। नगरान्तमनुप्राप्तं बुध्वा पुत्रमथाब्रवीत्।।2.42.13।।
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प्रियम् beloved, पुत्रम् son, अनुस्मरन् reflecting, दुःखार्तः tortured with sorrow, विललाप च lamented, अथ then, पुत्रम् son, नगरान्तम् end of the city, अनुप्राप्तम् havng reached, बुध्वा having realised, अब्रवीत् said.
The griefstricken king began to lament thinking of his beloved son, and (suddenly) realizing that his son had crossed the limits of the city, said: