idiom
learn your lesson
किसी अप्रिय अनुभव से सीखना ताकि उसे न दोहराया जाए
Meaning
to learn from an unpleasant experience so as not to repeat it
Example
After being late several times, he finally **learned his lesson**.
कई बार देर से आने के बाद, उसने आखिरकार **अपना पाठ सीखा**।