«ضَرْبِتِينْ فِي الرَّاسْ تِوْجَعْ»

The saying fits a person who has been wronged twice by the same individual, or who has been struck by two misfortunes in succession. It names the doubled harm and says plainly that such repeated hurt is painful.

The image is a simple physical one, blows landing on the head, used to describe emotional or practical injury. By counting two blows, it puts the weight on repetition: the complaint is about being hurt again after already having been hurt once.

Fits everyday colloquial talk when sympathizing with someone who has suffered a second injury or setback, or when explaining why a person will not put up with another offense from someone who has already wronged them once.