Which is the first commandment?

Mark 12:28 And one of the scribes came, and having heard them reasoning together, and perceiving that he had answered them well, asked him, Which is the first commandment of all? Matt 22:34 But when the Pharisees had heard that he had put the Sadducees to silence, they were gathered together. 35 Then one of them, which was a lawyer, asked him a question, tempting him, and saying, 36 Master, which is the great commandment in the law? Luke 10:25 And, behold, a certain lawyer stood up, and tempted him, saying, Master, what shall I do to inherit eternal life?26 He said unto him, What is written in the law? how readest thou?
Mark 12:29 And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord: 30 And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength [1] :this is the first commandment. Matt 22:37 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind [1]. 38 This is the first and great commandment. Luke 10:27a And he [the lawyer] answering said, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength, and with all thy mind [1];
Mark 12:31 And the second is like, namely this, Thou shalt love thy neighbour as thyself [2]. There is none other commandment greater than these. Matt 22:39 And the second is like unto it, Thou shalt love thy neighbour as thyself [2]. 40 On these two commandments hang all the law and the prophets. Luke 10:27b and thy neighbour as thyself [2].
Mark 12:32 And the scribe said unto him, Well, Master, thou hast said the truth: for there is one God; and there is none other but he: 33 And to love him with all the heart, and with all the understanding, and with all the soul, and with all the strength, and to love his neighbour as himself, is more than all whole burnt offerings and sacrifices. Luke 10:28 And he said unto him, Thou hast answered right: this do, and thou shalt live.
Mark 12:34 And when Jesus saw that he answered discreetly, he said unto him, Thou art not far from the kingdom of God. And no man after that durst ask him any question. Luke 10:29 But he, willing to justify himself, said unto Jesus, And who is my neighbour?
       

[1]Deuteronomy 6:4 Hear, O Israel: The Lord our God is one Lord: 5 And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might. Moses is speaking to Israel.

[2]Leviticus 19:18 Thou shalt not avenge, nor bear any grudge against the children of thy people, but thou shalt love thy neighbour as thyself: I am the Lord. God is speaking to Moses.