The Lord said to the Jews who had come to him, "Woe to you! for you build the tombs of the prophets whom your fathers killed. So you are witnesses and consent to the deeds of your fathers; for they killed them, and you build their tombs. Therefore also the Wisdom of God said, 'I will send them prophets and apostles, some of whom they will kill and persecute,' that the blood of all the prophets, shed from the foundation of the world, may be required of this generation, from the blood of Abel to the blood of Zacharias, who perished between the altar and the sanctuary. Yes, I tell you, it shall be required of this generation. Woe to you lawyers! for you have taken away the key of knowledge; you did not enter yourselves, and you hindered those who were entering." As he went away from there, the scribes and the Pharisees began to press him hard, and to provoke him to speak of many things, lying in wait for him, to catch at something he might say. In the meantime, when so many thousands of the multitude had gathered together that they trod upon one another, he began to say to his disciples first, "Beware of the leaven of the Pharisees, which is hypocrisy."