Ecclesiastes 2:23

New International Version

²³All their days their work is grief and pain;^(A) even at night their minds do not rest.^(B) This too is meaningless.

Ecclesiastes 2:23

New King James Version

²³For all his days are ^(A)sorrowful, and his work burdensome; even in the night his heart takes no rest. This also is vanity.

¹²Be warned, my son, of anything in addition to them.

Of making many books there is no end, and much study wearies the body.^(A)

¹²And further, my son, be admonished by these. Of making many books there is no end, and ^(A)much study is wearisome to the flesh.

New International Version (NIV)