From the Dhammapada Chapter XI
153., 154. Looking for the maker of this tabernacle, I shall have to run through a course of many births, so long as I do not find (him); and painful is birth again and again. But now, maker of the tabernacle, thou hast been seen; thou shalt not make up this tabernacle again. All thy rafters are broken, thy ridge-pole is sundered; the mind, approaching the Eternal (visankhâra, nirvâna), has attained to the extinction of all desires.
155. Men who have not observed proper discipline, and have not gained treasure in their youth, perish like old herons in a lake without fish.
156. Men who have not observed proper discipline, and have not gained treasure in their youth, lie, like broken bows, sighing after the past.
Sacred Books of the East, Vol. 10: The Dhammapada and Sutta Nipata, by Max Müller and Max Fausböll, [1881], at sacred-texts.com