You know the 1st commandment. You know the 2nd also. Sc. 78, Matthew 22:37–39, Mark 12:30–31, Luke 10:27, Deuteronomy 6:5. Leviticus 19:18
The Jews knew the 2 Great Commandments. They didn’t yet know Jesus' New Commandment Scene 82, John 13:34, which made their yoke easy & their burden light.