The Question about the Resurrection
23 On that day Sadducees (those who say that there is no resurrection) came to him. They asked him, 24 saying, “Teacher, Moses said, ‘If a man dies, having no children, his brother shall marry his wife, and raise up seed for his brother.’ 25 Now there were with us seven brothers. The first married and died, and having no seed left his wife to his brother. 26 In like manner the second also, and the third, to the seventh. 27 After them all, the woman died. 28 In the resurrection therefore, whose wife will she be of the seven? For they all had her.” 29 But Jesus answered them, “You are mistaken, not knowing the Scriptures, nor the power of God. 30 For in the resurrection they neither marry, nor are given in marriage, but are like God’s angels in heaven. 31 But concerning the resurrection of the dead, haven’t you read that which was spoken to you by God, saying, 32 ‘I am the God of Abraham, and the God of Isaac, and the God of Jacob?’  God is not the God of the dead, but of the living.” 33 When the multitudes heard it, they were astonished at his teaching.
The Great Commandment
34 But the Pharisees, when they heard that he had silenced the Sadducees, gathered themselves together. 35 One of them, a lawyer, asked him a question, testing him. 36 “Teacher, which is the greatest commandment in the law?” 37 Jesus said to him, “‘You shall love the Lord your God with all your heart, with all your soul, and with all your mind.’  38 This is the first and great commandment. 39 A second likewise is this, ‘You shall love your neighbor as yourself.’  40 The whole law and the prophets depend on these two commandments.”
The Question about David's Son
They said to him, “Of David.” 43 He said to them, “How then does David in the Spirit call him Lord, saying,
44 ‘The Lord said to my Lord,
sit on my right hand,
until I make your enemies a footstool for your feet?’  45 “If then David calls him Lord, how is he his son?” 46 No one was able to answer him a word, neither did any man dare ask him any more questions from that day forth.
22:32 Exodus 3:6
22:37 Deuteronomy 6:5
22:39 Leviticus 19:18
22:44 Psalm 110:1