Should I tell her?

Okay so last year I broke up with my abusive ex. He abused me for 3 years, He almost killed me and at that point I finally left him. Anyways. I’m in a new healthy relationship and I’m happy but I know he’s talking/dating to a new girl and I’m really concerned for her. I want to reach out and tell her to be careful but I also don’t wanna come off as a bitter or jealous ex. Should I say something or leave it alone? And no I don’t want him back nor do I still love him.