Identify some literary device from this quote (it's from romeo and juliet) that quench the fire of your pernicious rage with purple fountains issuing from your veins

In celtic mythology, one story involves macha, who was pregnant at the time she outraced the king’s horses on a wager. in norse history, freydis eiriksdottir was pregnant at the time that she single-handedly turned back the natives of vinland, who were at war with the norse. what do you think that pregnancy of these warrior women figured do prominently in mythology and folklore, as well as historical stories?