A proverb meaning 'do everything you can, then leave the rest to fate' — make every possible effort and accept the outcome determined by providence or fate.
試験対策は十分にやった。あとは人事を尽くして天命を待つだけだ。
I've prepared thoroughly for the exam. Now I can only do my best and leave the rest to fate.
手術は無事に終わった。医師たちは人事を尽くして天命を待つと家族に伝えた。
The operation finished safely. The doctors told the family that they had done everything possible and would now wait for fate.
プロジェクトに関しては人事を尽くして天命を待つしかない。結果は後で判断しよう。
Regarding the project, we can only do our best and leave the rest to chance. We'll assess the results later.