Joseph Benson's Commentary of the Old and New Testaments - Deuteronomy 21:19
Deuteronomy 21:19. His father and mother The consent of both is required, to prevent the abuse of this law to cruelty. And it cannot reasonably be supposed that both would agree without the son’s abominable and incorrigible wickedness, in which case it seems a righteous law, because the crime of rebellion against his own parents did so fully signify what a pernicious member he would be in the commonwealth of Israel, who had dissolved all his natural obligations. Unto the elders Which was... read more
Albert Barnes' Notes on the Whole Bible - Deuteronomy 21:18-21
The formal accusation of parents against a child was to be received without inquiry, as being its own proof. Thus the just authority of the parents is recognized and effectually upheld (compare Exodus 20:12; Exodus 21:15, Exodus 21:17; Leviticus 20:9); but the extreme and irresponsible power of life and death, conceded by the law of Rome and other pagan nations, is withheld from the Israelite father. In this, as in the last law, provision is made against the abuses of a necessary authority. read more