Matthew 22:34-38

Now when the Pharisees heard that He had silenced (muzzled) the Sadducees, they gathered together. [Mark 12:28-31; Luke 10:25-28] One of them, a lawyer [an expert in Mosaic Law], asked Jesus a question, to test Him: “Teacher, which is the greatest commandment in the Law?” [Mark 12:28] And Jesus replied to him, “ ‘YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND.’ [Deut 6:5] This is the first and greatest commandment.