What goes around comes around
kwi sɛmbɾɐ ʋens ɾrəkuʎ təmpəstats
In Catalan Qui sembra vents, recull tempestats.
This idiom is a common proverb about the consequences of one's actions.
Example
"Va mentir, i ara ningú no el creu. Qui sembra vents, recull tempestats."