Ramayana
सो ऽवर्धत तदा राम रावणान्तःपुरे शुभे । रक्ष्यमाणो वरस्त्रीभिश्छन्नः काष्ठैरिवानलः ॥ 7-12-31 ॥
He then grew up, O Rama, in the splendid inner apartments of Ravana, guarded by the finest of women, like fire concealed within firewood.
english translation