tataḥ - thereafter; ūrdhvam - after mother Sītā's going into the earth; brahmacaryam - complete celibacy; dhārayan - observing; ajuhot - performed a ritualistic ceremony and sacrifice; prabhuḥ - Lord Rāmacandra; trayodaśa-abda-sāhasram - for thirteen thousand years; agnihotram - the sacrifice known as Agnihotra-yajña; akhaṇḍitam - without ceasing.

After mother Sītā entered the earth, Lord Rāmacandra observed complete celibacy and performed an uninterrupted Agnihotra-yajña for thirteen thousand years.