Matthew 22:34–40
When  the  Pharisees  heard  that  Jesus  had silenced  the  Sadducees  they  got together and, to disconcert him, one of them put a question, ‘Master, which is the greatest commandment of the Law?’  Jesus said, ‘You must love the Lord your God with all your heart, with all your soul, and with all your mind.  This is the greatest and the first commandment. The second resembles it: You must love your neighbour as yourself. On these two commandments hang the whole Law, and the Prophets also.’