When the Pharisees heard that Jesus had silenced the Sadducees, they gathered together. One of them, a lawyer, asked Jesus which of the commandments was the greatest in the law. Jesus replied:
“You shall love Yahweh with all your heart, soul, and mind. This is the first and greatest commandment, and the second greatest is: You shall love your neighbors as much as you love your self. On these two commandments hang all the law and the wisdom of the prophets.”
While the Pharisees were gathered together, Jesus asked them:
“What do you believe about the messiah? Whose son will he be?”
They replied that he would be a descendant of David. Then Jesus said to them:
Why then does David call him lord, saying ‘Yahweh said to my Lord, sit at my right hand, until I make your enemies your footstool’? If David called him lord, how is the messiah his son?
No man among them was able to answer him, nor did any of them dare from that day forth ask him any more questions.
It is interesting that the verse Jesus quotes, from Psalm 110, actually refers to the King of Israel. But Jesus knew that his audience would interpret it as referring to the coming messiah, and that they, like many Jews, believed that the messiah would be a king. But if the psalm refers to a future king, how can that future king be a descendent of David, if David himself calls him adonai (lord)? Thus, Jesus used their own beliefs to silence them.