The Cow - 2:85 After all this, you still kill one another and drive out a group of you from their homes and unite against them in evil and enmity. It is already forbidden for you to drive them out of their homes, and as if that were not enough, when they are captured by you, you demand ransom from them. Or do you believe in part of the Book and disbelieve in part of it? What is the recompense for those who do so but disgrace in the life of this world and the harshest of torments on the Day of Resurrection? Allah is not heedless of what you do.
Do not kill one another:
The Women/4:29 Believers! Do not eat one another´s property by injustice and deceit, even in consensual trade. Do not kill one another. Allah is Most Merciful to you

The Cattle/6:151 "Say: "Come, let me tell you what your Lord has forbidden you: Do not associate anything with Him. Be kind to your parents. Do not kill your children for fear of poverty; We feed you and them. And do not approach the great sins openly or secretly, and do not kill a soul unjustly which Allah has forbidden. These are His admonitions to you that you may reflect."

The Night Journey/17:33 Do not kill unjustly a soul which Allah has forbidden. Whoever is killed unjustly, We have authorized his heirs. Let him not exceed the limit in killing out of revenge, for he has been helped

The Criterion/25:68 They do not invoke other gods along with Allah; they do not kill unjustly the life which Allah has forbidden, nor do they commit adultery. He who commits these things pays for his sins.

The Women/4:92 A believer shall not kill a believer except by accident. Whoever kills a believer by accident must release a believing slave and pay a diet to the family of the deceased. Unless they give up the diet and accept it as charity. If it is a believer from a community that is at war with you, then you must release a believing slave. But if the deceased belongs to a community with whom you have an agreement, then you must give his family a diet and release a believing slave. Whoever cannot find the money or a slave to release should fast for two months in a row so that Allah may accept his repentance. Allah is All-Knowing, All-Wise.

The Table Spread/5:32 Therefore We wrote to the Children of Israel: Whoever kills a person who has not committed murder or corrupted the earth, it is as if he had killed all mankind. And whoever gives life to that soul, it is as if he had given life to all mankind. Our messengers came to them with clear proofs. Nevertheless, most of them immediately began to commit transgression in the earth.

The Night Journey/17:31 Do not kill your children for fear of poverty. We provide for you and them. Killing them is a great crime

The Cattle/6:151 "Say: "Come, let me tell you what your Lord has forbidden you: Do not associate anything with Him. Be kind to your parents. Do not kill your children for fear of poverty; We feed you and them. And do not approach the great sins openly or secretly, and do not kill a soul unjustly which Allah has forbidden. These are His admonitions to you that you may reflect."