"And ye shall know the truth and the truth shall make you free. They answered him, We be Abraham's seed, and were never in bondage to any man: how sayest thou, Ye shall be made free?" (John 8:32-33)
When the Pharisees heard Jesus’ words they were indignant and upset they felt insulted that Jesus should call them “slaves”. They tried justifying their freedom based on their heritage, "We be Abraham's seed, and were never in bondage to any man: how sayest thou, ye shall be made free?”