只要你伤了我来日你必定死
[zhĭ yào nĭ shāng le wŏ lái rì nĭ bì dìng sĭ]
It reads 'if you hurt me now, there will surely come the day when I'll get my revenge on you,' implying that whoever inflicts harm should be prepared for eventual payback. This conveys a warning or vengeful attitude.