Proverbs 18:20

18 Casting the lot ends quarrels and separates strong opponents.

19 An offended brother is harder to win than a fortified city, and disputes are like the bars of a castle.

From the fruit of his mouth a man’s belly is filled; with the harvest from his lips he is satisfied.

21 Life and death are in the power of the tongue, and those who love it will eat its fruit.

22 He who finds a wife finds a good thing and obtains favor from the LORD.

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

Compare

BSB
From the fruit of his mouth a man’s belly is filled; with the harvest from his lips he is satisfied.
KJV
A man’s belly shall be satisfied with the fruit of his mouth; and with the increase of his lips shall he be filled.
WEB
A man’s stomach is filled with the fruit of his mouth. With the harvest of his lips he is satisfied.
ASV
A man`s belly shall be filled with the fruit of his mouth; With the increase of his lips shall he be satisfied.
DARBY
A man's belly is satisfied with the fruit of his mouth; with the increase of his lips is he satisfied.
BLB
From the fruit of the mouth of a man, his belly is satisfied; with the produce of his lips he is satisfied.
ÅB
Ved frukten av en manns munn mettes hans buk; med sine leppers grøde blir han mettet.
OTB
Fra frukten av deres munn fylles en persons mage; med avkastningen av deres lepper blir de tilfredsstilt.
B1930
Ved frukten av en manns munn mettes hans buk; med sine lebers grøde blir han mettet.

Study notes (Tyndale)

Original text and word study

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