Get the advice and consent of your parents

Then he came up and told his father and mother, “I saw one of the daughters of the Philistines at Timnah. Now get her for me as my wife. - Judges 14:2

Herein he is an example to all children (Samson). Conformably to the law of the fifth commandment, children ought not to marry, nor to move towards marrying, without the advice and consent of their parents; those that do (as bishop Hall here expresses it) willfully unchild themselves, and exchange natural affections for violent.

Parents have a property in their children as parts of themselves. In marriage this property is transferred; for such is the law of the relation that a man shall leave his father and his mother and cleave to his wife. It is therefore not only unkind and ungrateful, but very unjust, to alienate this property without their concurrence; whoso thus robs his father or mother, stealing himself from them, who is nearer and dearer to them than their goods, and yet says, It is no transgression, the same is the companion of a destroyer, Proverbs 28:24.

- Matthew Henry, Matthew Henry's Commentary on the Whole Bible