He cannot speak well that cannot hold his tongue. 
Proverbs on a similar topic
- When the word is out it belongs to another.
- The world is full of fools.
- Do not throw the baby out with the bathwater.
- It takes two to make a bargain.
- To set the wolf to keep the sheep.
- After us the deluge.
- A fool may throw a stone into a well which a hundred Wise men cannot pull out.
- Fools make feasts, and Wise men eat them.
- It is not the beard that makes the philosopher.
- Better the foot slip than the tongue.
- Fools rush in where angles fear to tread.
- A word and a stone let go cannot be called back.
- Empty vessels make the greatest sound.
- Ignorance is the mother of impudence.
- A great head and a little wit.
- If you sing before breakfast, you'll cry before night.
- If an ass goes a travelling, he'll not come home a horse.
- Give a fool rope enough, and he will hang himself.
- If the beard were all, the goat might preach.
- A fool will laugh when he is drowning.
- The brains don't lie in the beard.
- The head grey, and no brains yet.
- Make not your sauce till you have caught the fish.
- Send not a cat for lard.
- He that sends a fool means to follow him.
- A grey head is often placed on green shoulders.
- Sweet appears sour when we pay.
- If all fools wore feathers we should seem a flock of geese.
Related proverbs
Similar proverbs in the same language
English
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Talk much and err much.
- His tongue runs before his wit.
Similar proverbs in another language
Latin
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Lingua loquax, odiosa, procax, parit omne molestum.
A loquacious, obnoxious, impertinent tongue breeds every trouble.
French
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Qui garde sa bouche garde son âme.
He who guards his mouth guards his soul.
German
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Laß die Zunge nicht schneller als die Gedanken sein.
Do not let the tongue be quicker than the thoughts.
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Die Zunge ist schneller als der Kopf.
The tongue is faster than the head.
Czech
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Pro hubu na hubu.
For crying out loud.
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Každá straka od svého jazyka hyne.
Every magpie perishes from its tongue.
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Hneš mlčenou, kam chceš; mluvení nese pykání.
Thou shalt go silent where thou wilt; speaking brings rebuke.
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Jazyk hlavě nepřeje.
The tongue does not favor the head.
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Jazyk — hlavě nepřítel.
Language - the enemy's head.