'Goads' in the Bible

The words of the wise [are] like cattle goads; the collections of the sages [are] like pricks inflicted by one shepherd.

And [when] we had all fallen to the ground, I heard a voice saying to me in the Aramaic language, 'Saul, Saul, why are you persecuting me? [It is] hard for you to kick against the goads!'