Valmiki Ramayana 2.67.5

अतीता शर्वरी दुह्खम् या नो वर्ष शत उपमा ।अस्मिन् पन्चत्वम् आपन्ने पुत्र शोकेन पार्थिवे॥

atītā śarvarī duhkham yā no varṣa śata upamā |asmin pancatvam āpanne putra śokena pārthive ||

Our plain-language meaning of this verse is waiting for scholar review.