A spoken word is not a sparrow. Once it flies out, you can’t catch it.
More Russian Proverbs:
The riches that are in the heart cannot be stolen.Russian
Hold your children with your heart but teach them with your hands.
Russian
Better to turn back than to lose your way.
Russian
One day before you is better than ten years behind you.
Russian
A nightingale doesn't feed on songs.
Russian
He can cheat a fish of its skin.
Russian