Genesis 34:24-25

34:24 All the men who assembled at the city gate agreed with Hamor and his son Shechem. Every male who assembled at the city gate was circumcised. 34:25 In three days, when they were still in pain, two of Jacob’s sons, Simeon and Levi, Dinah’s brothers, each took his sword and went to the unsuspecting city and slaughtered every male.