许我情者此生不负负我心者必当诛之
[xŭ wŏ qíng zhĕ cĭ shēng bù fù fù wŏ xīn zhĕ bì dāng zhū zhī]
Translated to 'If you promise me love, I will never betray; if you hurt my feelings, then you should be punished'. This is like declaring that the user would be faithful only for those who love them faithfully and promises harsh consequences against any harm.