From Liu Xiyi
刘希夷's early-Tang 《
代悲白头翁》: ‘
年年岁岁花相似,
岁岁年年人不同。’ (Year upon year the flowers look alike; year upon year the people differ.) Traditional tale says Liu's uncle Song Zhiwen
宋之问 killed him to steal this couplet — likely apocryphal but shows how prized these lines were.