The Law of God taught by Jesus Christ

"Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets" (Matthew 7: 12)

Jesus teaches to a rich man, the precepts of the Law

"And behold, one came to him and said, Teacher, what good thing shall I do, that I may have eternal life? And he said unto him, Why askest thou me concerning that which is good? One there is who is good: but if thou wouldest enter into life, keep the commandments. He saith unto him, Which? And Jesus said, Thou shalt not kill, Thou shalt not commit adultery, Thou shalt not steal, Thou shalt not bear false witness, Honor thy father and mother; and, Thou shalt love thy neighbor as thyself. The young man saith unto him, All these things have I observed: what lack I yet? Jesus said unto him, If thou wouldest be perfect, go, sell that which thou hast, and give to the poor, and thou shalt have treasure in heaven: and come, follow me. But when the young man heard the saying, he went away sorrowful; for he was one that had great possessions" (Matthew 19: 16-22

These are the commandments of the Gospel, which are very different to the commandments of the Old Testament, for all the commandments of the Gospel are merciful, but many commandments of the Old Testament commanded death sentences, wars and slavery.  And those commandments weren't really God's Law.