Matsya Purana says: “One who sinks a well lives in heaven for as many years as there are drops of water in it. But to dig ten such wells equals in merit the digging of one pond; digging of ten such ponds was equal to making a lake; making of ten lakes was as meritorious as begetting a virtuous son but be getting ten such virtuous sons had the same sanctity as that of planting a single tree.”19
