Genesis 34:24

‘And all who went out of the gate of the city paid heed to Hamor, and Shechem his son, and every male was circumcised, all who went out of the gate of his city.'

“All who went out of the gate of the city.” That is the freemen. The slaves would have no option. All were circumcised as Hamor and Shechem had suggested. It was a small price to pay in return for such an increase in riches, and their king and prince were clearly convinced that it was for their good.