John Gills Exposition of the Bible Commentary - Proverbs 20:20
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, is highly base and criminal, but to curse them is shocking! what can such expect but the curse of God upon them? his lamp shall be put out in obscure darkness ... read more
Matthew Henry's Complete Commentary - Proverbs 20:20
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 being and have taken so much care and pains about him, and this in defiance of God and his law, which had made... read more