20 If someone curses their father or mother, their lamp will be snuffed out in pitch darkness.
20 Whoso curseth his father or his mother, his lamp lamp: or, candle shall be put out in obscure darkness.
20 If one curses his father or his mother, his lamp will be put out in utter darkness.
20 Anyone who curses father and mother extinguishes light and exists benighted. The Very Steps We Take
20 Whoever curses his father or his mother, His lamp will be put out in deep darkness.
20 If you insult your father or mother, your light will be snuffed out in total darkness.
(Read Proverbs 20:20)
An undutiful child will become very miserable. Never let him expect any peace or comfort.