the Book of Odes > always (to do something) as part of one's duty
Contents
夙夜 in public
  Explanation: From morning to night, eager public.
  Source: "Book of Songs, call the South to adopt Fan" was the Tong Tong, Su Ye in public. "
  Examples: Yi ~, to sit and wait once. ("Jin Shu Liu Yi Chuan")
No. 2
  【词目】:夙夜在公
  【发音】:sù yè zài gōng
  【释义】:从早到晚,勤于公务。
  【出处】:《诗经·召南·采蘩》:“被之僮僮,夙夜在公。”
  【示例】:毅~,坐而待旦。(《晋书·刘毅传》)
  【用法】:作谓语、定语;指官吏勤于政事。