Honour thy father and thy mother
|1st a b||6th|
12 Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.
16 Honour thy father and thy mother, as the LORD thy God hath commanded thee; that thy days may be prolonged, and that it may go well with thee, in the land which the LORD thy God giveth thee.
Exodus 21:17 : Disobedient and disrespectful children should be stoned to death.  Stoning is a slow and cruel death. Stoning to death is the prescribed Old Testament punishment for many different types of sins. In the New Testament Jesus confirmed that disobedient children should die. 
19 All that openeth the matrix is mine; and every firstling among thy cattle, whether ox or sheep, that is male.
20 But the firstling of an ass thou shalt redeem with a lamb: and if thou redeem him not, then shalt thou break his neck. All the firstborn of thy sons thou shalt redeem. And none shall appear before me empty.
- This is generally okay advice, but certainly shouldn't be a law.
- Some parents don't deserve to be honored, such as child abusers.
In United States law
- The 5th commandment is not a part of U.S. Law or (legal) custom. There is no law in the U.S. requiring a person to respect their parents. A minor may be considered to be under the jurisdiction of parents (providing the parents are not considered "bad" parents). However, once a person reaches the age of majority, this no longer applies and the child is afforded all of the right and protections toward the parents that they are afforded to any other person. Cursing ones father or mother is protected in the Bill of Rights under free speech protections.