Ecclesiastes 10:11

⁹ Whoso removeth stones shall be hurt therewith; and he that cleaveth wood shall be endangered thereby.

¹⁰ If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.

Surely the serpent will bite without enchantment; and a babbler is no better.

¹² The words of a wise man’s mouth are gracious; but the lips of a fool will swallow up himself.

¹³ The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: If the snake bites before it is charmed, there is no profit for the charmer.
KJV: Surely the serpent will bite without enchantment; and a babbler is no better.
WEB: If the snake bites before it is charmed, then is there no profit for the charmer’s tongue.
ASV: If the serpent bite before it is charmed, then is there no advantage in the charmer.
DARBY: If the serpent bite before enchantment, then the charmer hath no advantage.
BLB: If the snake bites without a charm, then there is no advantage for the master of the tongue.

ÅB: Når ormen biter uten besvergelse[^2], har tungens eier[^3] ingen nytte av den.
OTB: Hvis en slange biter før den er sjarmert, er det ingen fortjeneste for sjarmøren.
B1930: Når ormen biter uten besvergelse, har tungens eier ingen nytte av den. / < før besvergelsen har funnet sted; SLM 58, 6.> / < besvergeren.>

Jeremiah 8:17
For, behold, I will send serpents, cockatrices, among you, which will not be charmed, and they shall bite you, saith the LORD.
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Psalms 58:4–5
Their poison is like the poison of a serpent: they are like the deaf adder that stoppeth her ear;
Read in context
Psalms 52:2
Thy tongue deviseth mischiefs; like a sharp razor, working deceitfully.
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Psalms 64:3
Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words:
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Proverbs 18:21
Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
Read in context
James 3:6
And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell.
Read in context