8 Heb “from your understanding cease.” In the context this means that the person should have enough understanding to stop wearing himself out trying to be rich (cf. “be wise enough to desist”).
9 The Kethib is הֲתָעוּף (hata’uf), “do your eyes fly [light] on it?” The Qere is the Hiphil, הֲתָעִיף (hata’if) “do you cause your eyes to fly on it?” But the line is difficult. The question may be indirect: If you cast your eyes on it, it is gone—when you think you are close, it slips away. The term “riches” is not in the Hebrew text, but is supplied in the translation based on the previous verse.
10 This seventh saying warns people not to expend all their energy trying to get rich because riches are fleeting (cf. Instruction of Amememope, chap. 7, 9:10–11 which says, “they have made themselves wings like geese and have flown away to heaven”). In the ancient world the symbol of birds flying away signified fleeting wealth.

In other versions

Do not toil to acquire wealth;

be discerning enough to desist.

When your eyes light on it, it is gone,

for suddenly it sprouts wings,

flying like an eagle toward heaven.

Do not wear yourself out to get rich;

do not trust your own cleverness.

Cast but a glance at riches, and they are gone,

for they will surely sprout wings

and fly off to the sky like an eagle.

Don’t wear yourself out to get rich;

because you know better, stop!

As soon as your eyes fly to it, it disappears,

for it makes wings for itself

and flies like an eagle to the sky.

Don’t wear yourself out trying to get rich.

Be wise enough to know when to quit.

In the blink of an eye wealth disappears,

for it will sprout wings

and fly away like an eagle.

Do not tire in order to become rich;

out of your understanding, may you desist.

Your eyes will alight on it, but there is nothing to it,

for suddenly it will make for itself wings

like an eagle and it will be exhausted in the heavens.

Labour not to be rich:

Cease from thine own wisdom.

Wilt thou set thine eyes upon that which is not?

For riches certainly make themselves wings;

They fly away as an eagle toward heaven.

Public Domain