I believe the answer your looking for is in the TEN commandments and clearly states though Shalt Not KILL 1513 BC was the approximate date of the Exodus from Egypt. So the Ten Commandments were given to Moses shortly after that, and probably in the same year see below -
The Ten Commandments Bible list — What are the Ten Commandments?
The Ten Commandments (Exodus 20:2-17 NKJV) (New King James Version)
1 “I am the Lord your God, who brought you out of the land of Egypt, out of the house of bondage. You shall have no other gods before Me.
2 “You shall not make for yourself a carved image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth; you shall not bow down to them nor serve them. For I, the Lord your God, am a jealous God, visiting the iniquity of the fathers on the children to the third and fourth generations of those who hate Me, but showing mercy to thousands, to those who love Me and keep My Commandments.
3 “You shall not take the name of the Lord your God in vain, for the Lord will not hold him guiltless who takes His name in vain.
4 “Remember the Sabbath day, to keep it holy. Six days you shall labor and do all your work, but the seventh day is the Sabbath of the Lord your God. In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. For in six days the Lord made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.
5 “Honor your father and your mother, that your days may be long upon the land which the Lord your God is giving you.
6 “You shall not murder.
7 “You shall not commit adultery.
8 “You shall not steal.
9 “You shall not bear false witness against your neighbor.
10 “You shall not covet your neighbor's house; you shall not covet your neighbor's wife, nor his male servant, nor his female servant, nor his ox, nor his donkey, nor anything that is your neighbor's.”
Keeping the Ten Commandments meant more than just obeying the law. Keeping the commandments was synonymous with keeping the covenant with God. Practicing a life of obedience to the law demonstrated loyalty and dedication to God and faith in His promise to send a Savior who would redeem mankind from their sin. Thus, salvation was obtained through faith, not in the works of the law – though the works of the law are what God required as a demonstration of faith and commitment to God's covenant.
Disobedience to the law symbolized a breaking of the covenant with God and brought with it severe consequences. Sin alienates mankind from God. After Adam's sin God knew man was not capable of living a sinless life. God's covenant with His people, was not for the purpose of eliminating sin. Sin would be ever present. Nor did God sit in the heavens waiting for His people to disobey so He could enjoy punishing them. The purpose of the covenant was to separate a people unto Himself, provide the promise and hope of salvation, and to demonstrate the need for the "new covenant" in Jesus Christ.
God, in His mercy, required sacrifices to be made for sins. The penalty for sin is death and God allowed the death of an animal as payment for the sin. The sacrifices God required were symbolic of the future sacrifice made by the Lamb of God (Jesus Christ) for sin. The practice of obedience to the law, faith in God's promises, and sacrifice for sin demonstrated keeping God's covenant. Though God's people were by no means perfect, living a life in covenant brought God's blessing and protection upon His people.
Remember, this covenant was only part of God's plan to restore mankind to Himself. This covenant was inadequate to accomplish God's ultimate purpose. Does this indicate that God was shortsighted? Not at all. The old covenant (covenant with Israel) served as a shadow of things to come. It helped establish the need for a better way. It gave value to the work of Jesus Christ and became a physical tangible symbol of what Christ actually accomplished.
"The old system in the law of Moses was only a shadow of the things to come, not the reality of the good things Christ has done for us. The sacrifices under the old system were repeated again and again, year after year, but they were never able to provide perfect cleansing for those who came to worship. If they could have provided perfect cleansing, the sacrifices would have stopped, for the worshipers would have been purified once for all time, and their feelings of guilt would have disappeared. But just the opposite happened. Those yearly sacrifices reminded them of their sins year after year. For it is not possible for the blood of bulls and goats to take away sins…
"Christ said, “You did not want animal sacrifices or grain offerings or animals burned on the altar or other offerings for sin, nor were you pleased with them” (though they are required by the law of Moses). Then he added, “Look, I have come to do your will.” He cancels the first covenant in order to establish the second. And what God wants is for us to be made holy by the sacrifice of the body of Jesus Christ once for all time" (Hebrews 10:1-4, 8-10.
“This is the new covenant I will make with my people on that day, says the Lord: I will put my laws in their hearts so they will understand them, and I will write them on their minds so they will obey them.” Then he adds, “I will never again remember their sins and lawless deeds.” Now when sins have been forgiven, there is no need to offer any more sacrifices" (Hebrews 10:16-18).
The Ten Commandments are not an isolated set of rules that come from the Bible. They were part of a Divine covenant that has been fulfilled in a new covenant established in Christ.
"But our High Priest [Jesus] has been given a ministry that is far superior to the ministry of those who serve under the old laws, for he is the one who guarantees for us a better covenant with God, based on better promises. If the first covenant had been faultless, there would have been no need for a second covenant to replace it. But God himself found fault with the old one when he said:
“The day will come, says the Lord, when I will make a new covenant with the people of Israel and Judah. This covenant will not be like the one I made with their ancestors when I took them by the hand and led them out of the land of Egypt. They did not remain faithful to my covenant, so I turned my back on them, says the Lord. But this is the new covenant I will make with the people of Israel on that day, says the Lord: I will put my laws in their minds so they will understand them, and I will write them on their hearts so they will obey them. I will be their God, and they will be my people. And they will not need to teach their neighbors, nor will they need to teach their family, saying, ‘You should know the Lord.’ For everyone, from the least to the greatest, will already know me. And I will forgive their wrongdoings, and I will never again remember their sins.” (Hebrews 8:6-12).