2 sentences

1. 我这次原谅你，但下不为例。

   wǒ zhè cì yuán​liàng nǐ, dàn xià​bù​wéi​lì.

   I'll forgive you this time, but don't let it happen again.

   Source: Dong Chinese Dictionary

2. 这次就便宜你了，下不为例。

   zhè cì jiù pián​yi nǐ le, xià​bù​wéi​lì.

   I'll let you off easy this time, but don't let it happen again.

   Source: Dong Chinese Dictionary