 अधिगम्य तु वैदेहीं निलयं रावणस्य च।अस्त पर्वतमासाद्य पूर्णे मासे निवर्तत।। 
 Go and find out Sita and the abode of Ravana. After this, return to the mountain behind which the Sun sets and come back on completion of a month. 