Proverbs 29:19-21

Amplified Bible

¹⁹ 
A servant will not be corrected by words alone;
For though he understands, he will not respond [nor pay attention].
²⁰ 
Do you see a [conceited] man who speaks quickly [offering his opinions or answering without thinking]?
There is more hope for a [thickheaded] ^[a]fool than for him.
²¹ 
He who pampers his slave from childhood
Will find him to be a son in the end.