Mark 12:29-31 (New King James Version)

²⁹ Jesus answered him, “The first of all the commandments is: ‘Hear, O Israel, the LORD our God, the LORD is one. ³⁰ And you shall love the LORD your God with all your heart, with all your soul, with all your mind, and with all your strength.’ This is the first commandment. ³¹ And the second, like it, is this: ‘You shall love your neighbor as yourself.’ There is no other commandment greater than these.”