One verse

Srimad Bhagavatam 9.11.15

9.11.15

मुनौ निक्षिप्य तनयौ सीता भर्त्रा विवासिता । ध्यायन्ती रामचरणौ विवरं प्रविवेश ह ॥ १५ ॥

munau niksipya tanayau sita bhartra vivasita dhyayanti rama-caranau vivaram pravivesa ha

munau
unto the great sage Valmiki
niksipya
giving in charge
tanayau
the two sons Lava and Kusa
sita
mother Sitadevi
bhartra
by her husband
vivasita
banished
dhyayanti
meditating upon
rama-caranau
the lotus feet of Lord Ramacandra
vivaram
within the earth
pravivesa
she entered
ha
indeed.

Being forsaken by her husband, Sitadevi entrusted her two sons to the care of Valmiki Muni. Then, meditating upon the lotus feet of Lord Ramacandra, she entered into the earth.