péi le fū rén yòu zhé bīng

ㄆㄟˊ ㄌㄜ˙ ㄈㄨㄖㄣˊ ㄧㄡˋ ㄓㄜˊ ㄅㄧㄥ

Idiom

1fig. to suffer a double loss after trying to trick the enemy

2lit. having given away a bride, to lose one's army on top of it (idiom)