munau nikṣipya tanayau
sītā bhartrā vivāsitā
dhyāyantī rāma-caraṇau
vivaraṁ praviveśa ha
munau - unto the great sage Vālmīki; nikṣipya - giving in charge; tanayau - the two sons Lava and Kuśa; sītā - mother Sītādevī; bhartrā - by her husband; vivāsitā - banished; dhyāyantī - meditating upon; rāma-caraṇau - the lotus feet of Lord Rāmacandra; vivaram - within the earth; praviveśa - she entered; ha - indeed.
It was impossible for Sītādevī to live in separation from Lord Rāmacandra. Therefore, after entrusting her two sons to the care of Vālmīki Muni, she entered into the earth.