Proverbs 27:21-23

Young's Literal Translation

²¹ A refining pot [is] for silver, and a furnace for gold, And a man according to his praise.

²² If thou dost beat the foolish in a mortar, Among washed things -- with a pestle, His folly turneth not aside from off him.

²³ Know well the face of thy flock, Set thy heart to the droves,