Solomon
Proverbs 20:20ESV·traditional attribution

If one curses his father or his mother, his lamp will be put out in utter darkness.

Matthew Henry Presbyterian @wholebiblehenry

Here is, 1. An undutiful child become very wicked by degrees. He began with despising his father and mother, slighting their instructions, disobeying their commands, and raging at their rebukes, but at length he arrives at such a pitch of impudence and impiety as to curse them, to give them scurrilous and opprobrious language, and to wish mischief to those that were instruments of his...

John Gill Reformed Baptist @doctorgill

Whoso curseth his father or his mother,.... This is dreadful indeed! a person must be got to a great pitch of wickedness to do this; to curse his parents, one or other of them, that have been the instruments of his being, and by whom he has been brought up and put out into the world; to slight them, despise them, and mock at them...

Jamieson-Fausset-Brown Reformed @jfbcommentary

his lamp--(Compare Pro 13:9; Pro 24:20).