"Once bitten, twice shy"

Yes. Fool me once, shame on you. Fool me twice, shame on me. There's another one similar, but I can' think of it at the moment.

"Fool me once, shame on you. Fool me twice, shame on me." I am not sure if it is English, but I have heard it. It means that you can fall for someone's tricks once, but if they trick you twice, then it is your fault.