you'll regret it
You won't regret it.
No malgastes tu juventud, si no, lo lamentarás más tarde.
Don't waste your youth, or you'll regret it later.
One day you'll regret it.
¡Y no insultes a los Soubeyran porque lo lamentarás!
And don't insult the Soubeyrans, or you'll regret it!
— Jean de Florette (1986)
Llegará el día en que lo lamentarás.
The day will come when you will regret it.
Llegará la hora en que lo lamentarás.
The time will come when you will regret it.