Which of these sayings is NOT from the Sermon on the Mount in St Matthew's Gospel?

The saying "Honor your father and your mother" is not found in the Sermon on the Mount; it is actually from the Ten Commandments, specifically from Exodus 20:12. The Sermon on the Mount, which encompasses chapters 5 to 7 of St. Matthew's Gospel, focuses on the teachings of Jesus regarding ethics, morality, and the kingdom of heaven, emphasizing principles such as mercy, righteousness, and love.

In contrast, the other sayings listed are key teachings within the Sermon on the Mount. "Blessed are the meek, for they shall inherit the earth" is part of the Beatitudes, which outline the attitudes and characteristics of those who are blessed in God's kingdom. Similarly, "Love your enemies and pray for those who persecute you" reflects Jesus' radical call to love and forgiveness, while "Do not judge, or you too will be judged" addresses the way individuals should assess others without hypocrisy. Each of these phrases encapsulates core themes of Jesus' moral instruction and social engagement as recorded in St. Matthew's Gospel.