Ecclesiastes 12:12

12:12 Furthermore, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.
-World English Bible

Other Translation

12:12 And further, by these, my son, be admonished: of making many books [there is] no end; and much study [is] a weariness of the flesh.
-King James Version