 यावद्राजा प्रियं पुत्रं पश्यत्यत्यन्तधार्मिकम्।तावद्व्यवर्धते वास्य धरण्यां पुत्रदर्शने।। 
  So long as king Dasaratha was able to see his exceedingly virtuous and beloved  son Rama, it appeared that his body kept rising from the earth to have a sight of his son. 