情なさけが仇あだ

expression

kindness can backfire; pardon makes offenders

Proverb warning that excessive leniency or kindness may be taken advantage of, leading to harm. Often used when someone's good intentions are repaid with ingratitude or betrayal.

• 彼かれを許ゆるしたのが情なさけが仇あだとなって、また騙だまされた。

  My forgiving him backfired, and I was deceived again.

• 情なさけが仇あだになることもあるから、甘あまやかしすぎないほうがいい。

  Sometimes kindness can backfire, so it's better not to be too indulgent.