Origen
Catena Aurea · Matthäusevangelium 22
But when the Pharisees had heard that he had put the Sadducees to silence, they were gathered together. Then one of them, which was a Lawyer, asked him a question, tempting him, and saying, Master, which is the great commandment in the Law? Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the Law and the Prophets.
He said Master tempting Him, for none but a disciple would thus address Christ. Whoever then does not learn of the Word, nor yields himself wholly up to it, yet calls it Master, he is brother to this Pharisee thus tempting Christ. Perhaps while they read the Law before the Saviour’s coming, it was a question among them which was the great commandment in it; nor would the Pharisee have asked this, if it had not been long time enquired among themselves, but never found till Jesus came and declared it.