喺度食 唔好喺度屙 Don't eat where you shit!

e.g. "I don't eat where I shit" says Jesse in Breaking Bad, Netflix.

唔知道係巧合, 定還是呢句香港俗語, 在美國 港人俗語文化影響到美國 (如果你知道, 來龍去脈 請分享給我們)

Reference:

"The idiom 'don't sit/defecate where you eat' means:

One should not cause trouble in a place, group or situation in which one regularly finds oneself"
source: https://english.stackexchange.com/questions/284671/dont-st-where-you-eat