"Sanctify unto Me every first-born"—generic (implying both males and females). (Devarim 15:19) "the male"—specific, (excluding females). If I have the generic, why do I need the specific? For if I read the generic without the specific, I would assume that anything born first is a "bechor," whether male or female. It is, therefore, written "… the male"—males, but not females. If I have the specific, why do I need the generic? For if I read the specific without the generic, I would assume that any male, whether or not he opens the womb (first) is a "bechor." It is, therefore, written "Sanctify unto Me every bechor, the opener of the womb"—he must be both male and the opener of the womb, as it is written (Exodus 34:19) "All firstlings of the womb are Mine, and (of) all of your kine that bears a male, etc."