Hekayat 12 from Chapter 8 of Golestan of Saadi

Speak between two enemies in such a way that if they become friends, you will not be ashamed.

Between two people, a quarrel is like a fire;
An unfortunate tattler is like a firewood carrier.

They make up, and delight their hearts once again,
While the tattler remains blind in fortune and ashamed.

Setting a fire between two people,
Is not wise, and being burned in the process.

Be cautious in speaking with friends,
So that the bloodthirsty enemy does not hear.

Be mindful of what you say near a wall,
Lest there be ears behind the wall.

سخن میان دو دشمن چنان گوی که گر دوست گردند شرم زده نشوی.

میان دو کس جنگ چون آتش است

سخن چین بدبخت هیزم کش است

کنند این و آن خوش دگرباره دل

وی اندر میان کوربخت و خجل

میان دو تن آتش افروختن

نه عقل است و خود در میان سوختن

در سخن با دوستان آهسته باش

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