One by one, the groups of religious leaders in Jerusalem had come to Jesus trying to get Jesus to say something they could use against Him. One by one, He shut them down. Luke 20:
27 Some of the Sadducees, who say there is no resurrection, came to Jesus with a question. 28 “Teacher,” they said, “Moses wrote for us that if a man’s brother dies and leaves a wife but no children, the man must marry the widow and raise up offspring for his brother. 29 Now there were seven brothers. The first one married a woman and died childless. 30 The second 31 and then the third married her, and in the same way the seven died, leaving no children. 32 Finally, the woman died too. 33 Now then, at the resurrection whose wife will she be, since the seven were married to her?”
34 Jesus replied, “The people of this age marry and are given in marriage. 35 But those who are considered worthy of taking part in the age to come and in the resurrection from the dead will neither marry nor be given in marriage, 36 and they can no longer die; for they are like the angels. They are God’s children, since they are children of the resurrection. 37 But in the account of the burning bush, even Moses showed that the dead rise, for he calls the Lord ‘the God of Abraham, and the God of Isaac, and the God of Jacob.’ 38 He is not the God of the dead, but of the living, for to him all are alive.”
39 Some of the teachers of the law responded, “Well said, teacher!” 40 And no one dared to ask him any more questions.
34 Jesus replied, “The people of this age marry and are given in marriage. 35 But those who are considered worthy of taking part in the age to come and in the resurrection from the dead will neither marry nor be given in marriage, 36 and they can no longer die; for they are like the angels. They are God’s children, since they are children of the resurrection. 37 But in the account of the burning bush, even Moses showed that the dead rise, for he calls the Lord ‘the God of Abraham, and the God of Isaac, and the God of Jacob.’ 38 He is not the God of the dead, but of the living, for to him all are alive.”
39 Some of the teachers of the law responded, “Well said, teacher!” 40 And no one dared to ask him any more questions.
These men thought the idea of the resurrection was ridiculous, but their hypothetical situation was even more ridiculous. Jesus shows that with His simple reply: "There is no death in heaven." There will be no problems like this. And just to calm their minds, and shut their mouths, Jesus pointed them to the only writer of scripture they respected: Moses. Even he believed in the resurrection of the dead, so why didn't they? The resurrection of the dead changes everything.