Berean Standard Bible (BSB)
So my heart began to despair over all the labor that I had done under the sun.
World English Bible (WEB)
Therefore I began to cause my heart to despair concerning all the labor in which I had labored under the sun.
Strong's King James
Therefore I went about{H5437}{(H8804)} to cause{H2976} my heart{H3820} to despair{H2976}{(H8763)} of all the labour{H5999} which I took{H5998}{(H8804)} under the sun{H8121}.
The F.O.G *
So I turned aside my heart to despair over all the labour for which I had laboured under the sun.
The F.O.G Message *
Young's Literal Translation
And I turned round to cause my heart to despair concerning all the labour that I laboured at under the sun.