Parakramabahu I of Polonnaruwa

Parākramabāhu I, or Parakramabahu the Great, was the king of Polonnaruwa from 1153 to 1186. He oversaw the expansion and beautification of his capital, constructed extensive irrigation systems, reorganised the country's army, reformed Buddhist practices, encouraged the arts and undertook military campaigns in South India and Burma. The adage, "Not even a drop of water that comes from the rain must flow into the ocean without being made useful to man" is one of his most famous utterances."