Ecclesiastes 9:10

8 Let thy garments be always white; and let thy head lack no ointment.

9 Live joyfully with the wife whom thou lovest all the days of the life of thy vanity, which he hath given thee under the sun, all the days of thy vanity: for that is thy portion in this life, and in thy labour which thou takest under the sun.

Whatsoever thy hand findeth to do, do it with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest.

11 I returned, and saw under the sun, that the race is not to the swift, nor the battle to the strong, neither yet bread to the wise, nor yet riches to men of understanding, nor yet favour to men of skill; but time and chance happeneth to them all.

12 For man also knoweth not his time: as the fishes that are taken in an evil net, and as the birds that are caught in the snare; so are the sons of men snared in an evil time, when it falleth suddenly upon them.

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

Compare

BSB
Whatever you find to do with your hands, do it with all your might, for in Sheol, where you are going, there is no work or planning or knowledge or wisdom.
KJV
Whatsoever thy hand findeth to do, do it with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest.
WEB
Whatever your hand finds to do, do it with your might; for there is no work, nor plan, nor knowledge, nor wisdom, in Sheol, where you are going.
ASV
Whatsoever thy hand findeth to do, do [it] with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in Sheol, whither thou goest.
DARBY
Whatever thy hand findeth to do, do with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in Sheol, whither thou goest.
BLB
All that your hand finds to do, with your strength you must do [it], for [there is] no work or plan or knowledge or wisdom in Sheol, there where you are going.
ÅB
Alt det din hånd er i stand til å gjøre med din kraft, det skal du gjøre! For det finnes hverken gjerning eller klokskap eller kunnskap eller visdom i dødsriket, dit du går.
OTB
Hva enn din hånd finner å gjøre, gjør det med all din makt, for i Sheol, hvor du går, er det verken aktivitet eller planlegging eller kunnskap eller visdom.
B1930
Alt det din hånd er i stand til å gjøre med din kraft, det skal du gjøre! For det finnes hverken gjerning eller klokskap eller kunnskap eller visdom i dødsriket, dit du går.

Study notes (Tyndale)

Original text and word study

Cross references