When mahabharta war ended and all kauravs were killed gandhari mother of duryodhna cursed rRIShi toldikrishna that you could have saved my sons from wrong battle but now they are killed so i curse you all yadavas will killed in war amogst themselvesafter war yadavas become very powerful and start drinking heavily. in one such ebriated state they went to a very pious saint/mahatma,one of theman pretened to be a pregnant lady and ask russi/saint to forecast what will be borne to this lady.ri ishi d that this person will give birthto toltmace wilprove to be a yama for you next day that saw labour like pains in body of a man and gave a birth to mace.this filled them with fear and they make powder of maceand scattered it is sea after sometimethere sprang a dense cropof rushesafter some days yadavas in drinking stage some whom fought for pandvas and some kayravas discussed war and quarell among themselvesin arguments andrushesthat has grown out of mace become a mace andused by them on one ...more

Al the family members of lord krishna, they fought each other and died