Greatest Commandments: You shall love the LORD your God with all your heart, with all your soul, and with all your strength and you shall love your neighbor as yourself

[Luke 10:25-29] And behold, a certain lawyer stood up and tested Him, saying, “Teacher, what shall I do to inherit eternal life?” He said to him, “What is written in the law? What is your reading of it?”
So he answered and said, “ ‘You shall love the LORD your God with all your heart, with all your soul, with all your strength, and with all your mind,’ and your neighbor as yourself.’ ” And He said to him, “You have answered rightly; do this and you will live.

[Deuteronomy 6:4-6] Hear, O Israel: The LORD our God, the LORD is one! You shall love the LORD your God with all your heart, with all your soul, and with all your strength. “And these words which I command you today shall be in your heart

[Leviticus 19:18] You shall not take vengeance, nor bear any grudge against the children of your people, but you shall love your neighbor as yourself: I am the LORD.