Mark 12:28-30

Then one of the scribes [an expert in Mosaic Law] came up and listened to them arguing [with one another], and noticing that Jesus answered them well, asked Him, “Which commandment is first and most important of all?” [Matt 22:34-40; Luke 10:25-28] Jesus answered, “The first and most important one is: ‘HEAR, O ISRAEL, THE LORD OUR GOD IS ONE LORD; AND YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL (life), AND WITH ALL YOUR MIND (thought, understanding), AND WITH ALL YOUR STRENGTH.’ [Deut 6:4, 5]