Valmiki Ramayana Ayodhya Kanda Sarga 40 Shloka 36

श्रीमान् prosperous, नृपतिः king, एकचित्तगतम् absorbed in the same thought, पुरम् the city, दृष्ट्वा having seen, दुःखेन with grief, हतमूलः with roots severed, द्रुमः इव like tree, निपपातैव fell down.

Having seen the city (people) absorbed in one single thought, the prosperous king, griefstricken, fell down on the ground like a tree severed at its root.