What are Muslims forbiden to do?

Answer 1

151. Say: Come, I will recite unto you that which your Lord hath made a sacred duty for you: That ye ascribe no thing as partner unto Him and that ye do good to parents, and that ye slay not your children because of penury - We provide for you and for them - and that ye draw not nigh to lewd things whether open or concealed. And that ye slay not the life which Allah hath made sacred, save in the course of justice. This He hath command you, in order that ye may discern.

152. And approach not the wealth of the orphan save with that which is better, till he reach maturity. Give full measure and full weight, in justice. We task not any soul beyond its scope. And if ye give your word, do justice thereunto, even though it be (against) a kinsman; and fulfil the covenant of Allah. This He commandeth you that haply ye may remember.

32. For that cause We decreed for the Children of Israel that whosoever killeth a human being for other than manslaughter or corruption in the earth, it shall be as if he had killed all mankind, and whoso saveth the life of one, it shall be as if he had saved the life of all mankind. Our messengers came unto them of old with clear proofs (of Allah's Sovereignty), but afterwards lo! many of them became prodigals in the earth.

[Quoted from, Meanings of the Glorious Quran, by Marmaduke Pickthall]

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