daai6 naan6 bat1 sei2 ，bit1 jau5 hau6 fuk1大難不死，必有後福大难不死，必有后福

How it's used

This idiom is used to comfort someone who has just narrowly escaped a dangerous situation or a major life crisis. It frames the traumatic event as a necessary precursor to future prosperity rather than just a stroke of luck. It carries a sense of optimism and destiny that is often invoked to help people regain their confidence after a setback.