Then shall his father and his mother lay hold on him, and bring him out unto the elders of his city, and unto the gate of his place;

Wesley's Notes

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 a sufficient caution to preserve children from the malice of any hard - hearted parents, because these elders were first to examine the cause with all exactness, and then to pronounce the sentence.

Matthew Henry's Concise Commentary

21:18-21 Observe how the criminal is here described. He is a stubborn and rebellious son. No child was to fare the worse for weakness of capacity, slowness, or dulness, but for wilfulness and obstinacy. Nothing draws men into all manner of wickedness, and hardens them in it more certainly and fatally, than drunkenness. When men take to drinking, they forget the law of honouring parents. His own father and mother must complain of him to the elders of the city. Children who forget their duty, must thank themselves, and not blame their parents, if they are regarded with less and less affection. He must be publicly stoned to death by the men of his city. Disobedience to a parent's authority must be very evil, when such a punishment was ordered; nor is it less provoking to God now, though it escapes punishment in this world. But when young people early become slaves to sensual appetites, the heart soon grows hard, and the conscience callous; and we can expect nothing but rebellion and destruction.