NET

8 A man who is all alone with no companion, he has no children nor siblings; yet there is no end to all his toil, and he is never satisfied with riches. He laments, “For whom am I toiling and depriving myself of pleasure?” This also is futile and a burdensome task!

Darby

8 There is one [alone] and without a second; also he hath neither son nor brother: yet is there no end of all his labour, neither is his eye satisfied with riches, and [he saith not], For whom then am I labouring, and depriving my soul of good? This also is vanity and a grievous occupation.

KJV

8 There is one [alone], and [there is] not a second; yea, he hath neither child nor brother: yet [is there] no end of all his labour; neither is his eye satisfied with riches; neither [saith he], For whom do I labour, and bereave my soul of good? This [is] also vanity, yea, it [is] a sore travail.