Valmiki Ramayana 3.73.32

सु दुःख आरोहणः च एव शिशु नाग अभिरक्षितः ।उदारो ब्रह्मणा चैव पूर्व काले विनिर्मितः॥

su duḥkha ārohaṇaḥ ca eva śiśu nāga abhirakṣitaḥ |udāro brahmaṇā caiva pūrva kāle vinirmitaḥ ||

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