Canto 2 -
Ayodhyā-kāṇḍa
Chapter 67: The Sages Request Vasiṣṭha to Coronate a son of Daśaratha
Text 2.67.5

अतीता शर्वरी दुःखं या नो वर्षशतोपमा।
अस्मिन्पञ्चत्वमापन्ने पुत्रशोकेन पार्थिवे॥

atītā śarvarī duḥkhaṁ yā no varṣa-śatopamā
asmin pañcatvam āpanne putra-śokena pārthive

atītā = passed yesterday; śarvarī = night; duḥkham = the sorrowful; = that; naḥ = we; varṣa-śata-upamā = seemed to be as long as hundred years; asmin pañcatvam āpanne = died; putra-śokena = in distress over his son; pārthive = after the king.

After the king died in distress over his son, the sorrowful night that we passed yesterday seemed to be as long as hundred years.