Mark 12:28-30

One of the teachers of religious law was standing there listening to the debate. He realized that Jesus had answered well, so he asked, “Of all the commandments, which is the most important?” Jesus replied, “The most important commandment is this: ‘Listen, O Israel! The LORD our God is the one and only LORD. And you must love the LORD your God with all your heart, all your soul, all your mind, and all your strength.’