Never say what you will regret

Once a farmer called his neighbor by bad words and slangs, but later when he realized his mistake, he went to a saint. He asked the saint to take back his words. The saint said to the farmer, "Gather a lot of feathers, and keep them in the middle of the city." The farmer did the same and then reached the saint.

Then the saint said, "Now go and collect those wings and bring them back."The farmer went back but by then all the feathers had flown away from the wind. And the farmer reached empty-handed to the saint. Then the saint told him that the same thing happens with the words spoken by you, you can easily take them out of your mouth but you cannot take them back even if you want.