【始乱终弃】〖sh luàn zhng qì〗[First he abused her and in the end he gave her up; have illicit intercourse at the beginning and desert her at the end; forsake after having dallied with; discard (kick away) after having made use of]

始料所及人品低，

乱臣贼子怀异志。

终天抱恨花病染，

弃好背盟恶臭遗。