Ecclesiastes 12:11 in the World English Bible
The words of the wise are like goads; and like nails well fastened are words from the masters of assemblies, which are given from one shepherd.
Context
10 The preacher sought to find out acceptable words: and that which was written was upright, even words of truth.
11 The words of the wise are as goads, and as nails fastened by the masters of assemblies, which are given from one shepherd.
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.