As long as the dust raised by the wheels of the chariot of Rama (who was departing to the forest) was visible, Dasaratha, the best of the Ikshvakus, could not withdraw his eyes (from Rama). [2-42-1]
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. [2-42-2]