“Do not go near unlawful sexual intercourse. It is truly a shameful deed and an evil way. And do not take the life which Allah has made sacred, except with legal right. If anyone is killed unjustly, We have given his heir authority; but let him not exceed the limits in taking life, for he has been granted help.” (32–33)
“Do not go near unlawful sexual intercourse. It is truly a shameful deed and an evil way.” “And do not take the life which Allah has made sacred, except with legal right.” The cases in which a life may lawfully be taken are indicated by what we have narrated: the Prophet, may Allah bless him and grant him peace, said: “The blood of a Muslim person is not lawful except in one of three cases: a man who disbelieves after having believed, commits adultery after having been married, or kills a person who had not killed another; he is then killed for it.” (1)
“If anyone is killed unjustly, We have given his heir authority”: that is, power and legal authority over the killer, allowing him to have him put to death. This was stated by Mujahid. Al-Dahhak said: His authority consists in his having a choice: if he wishes, he may exact legal retaliation from him; if he wishes, he may accept blood money; and if he wishes, he may pardon him.
“But let him not exceed the limits in taking life.” Hamzah and al-Kisa’i recited it, “Do not exceed the limits,” with the second-person form, addressing the heir of the slain person. The others recited it with the third-person form: that is, the heir must not exceed the limits in taking life.
They differed concerning this excess which is prohibited. Ibn Abbas and most commentators said that it means that he must not kill anyone other than the killer. For in the Age of Ignorance, when one of their people was killed, they would not be satisfied with killing his killer until they had killed someone of higher standing than him.
Sa‘id ibn Jubayr said: If the killer is one person, he must not kill a group in place of one person. When the slain person was a man of rank, the people of the Age of Ignorance would not be satisfied with killing the killer [alone] (2) until they had killed a group of his relatives along with him.
Qatadah said: It means that he must not mutilate the killer. (3)
“For he has been granted help.” According to Mujahid, the pronoun refers back to the slain person in His saying, “If anyone is killed unjustly.” That is, the slain person is granted help in this world through the legal requirement of retaliation against his killer, and in the Hereafter through the expiation of his sins and the punishment of his killer with the Fire.
Qatadah said: The pronoun refers to the heir of the slain person. Its meaning is that he is granted help against the killer by exacting either legal retaliation from him or blood money.