Proverbs 21:20

18 The wicked become a ransom for the righteous, and the faithless for the upright.

19 Better to live in the desert than with a contentious and ill-tempered wife.

Precious treasures and oil are in the dwelling of the wise, but a foolish man consumes them.

21 He who pursues righteousness and loving devotion finds life, righteousness, and honor.

22 A wise man scales the city of the mighty and pulls down the stronghold in which they trust.

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

Compare

BSB
Precious treasures and oil are in the dwelling of the wise, but a foolish man consumes them.
KJV
There is treasure to be desired and oil in the dwelling of the wise; but a foolish man spendeth it up.
WEB
There is precious treasure and oil in the dwelling of the wise, but a foolish man swallows it up.
ASV
There is precious treasure and oil in the dwelling of the wise; But a foolish man swalloweth it up.
DARBY
There is costly store and oil in the dwelling of a wise [man]; but a foolish man swalloweth it up.
BLB
Treasure to be desired and oil [are] in the dwelling of a wise one, and a foolish man swallows it up.
ÅB
Kostelige skatter og olje er det i den vises hus, men dåren gjør ende på det.
OTB
De vise lagrer opp dyrebar skatt og olje, men de tåpelige forbruker alt.
B1930
Kostelige skatter og olje er det i den vises hus, men dåren gjør ende på det.

Study notes (Tyndale)

Original text and word study

Cross references