そんしてとくとれ
you must lose a fly to catch a trout; sometimes the best gain is to lose
Also written 損して得とれ
Expression
今度こんどの商売しょうばいは、損そんして得取とくとれ、という戦略せんりゃくでやろうよ。
In our next line of business let's make it our strategy to win by losing.