Proverb: 'A departing bird does not soil its nest.' It means one should leave a place in good order and not cause trouble for others when leaving.
彼は転職の際、引き継ぎをしっかり行い、飛ぶ鳥跡を濁さず去った。
When he changed jobs, he handed over his duties properly and left without leaving a mess.
この会社を去る時は皆に感謝を伝え、飛ぶ鳥跡を濁さずに去りたい。
When leaving this company I want to thank everyone and leave without causing trouble.
母はいつも「立つ鳥跡を濁さず」と言って、掃除や整理をきちんとするよう教えた。
My mother always told us 'a departing bird does not soil its nest' and taught us to clean up properly.