the offender should be killed by the same means with which he killed, due to the general import of Allah’s saying: “O you who believe, prescribed for you is legal retribution for those who have been killed” [al-Baqarah 2:178]. Complete retaliation consists in doing to the offender what he did, for the word derives from following a trace. This is also indicated by Allah’s saying: “So whoever has assaulted you, then assault him in the same way that he has assaulted you” [al-Baqarah 2:194]; His saying: “And if you punish, then punish with an equivalent of that with which you were harmed” [al-Nahl 16:126]; and His saying: “The recompense of an evil is an evil like it” [al-Shura 42:40], as well as other similar verses.
Moreover, the Prophet, peace and blessings be upon him, had the head of the Jewish man crushed between two stones because he had killed the Ansari girl by crushing her head between two stones (1). This is specific evidence, whereas the verses we have cited are general evidence. Thus, these are proofs from the Quran and the sunnah. Reason also supports this: how can this offender mutilate the victim, kill him in the most horrific manner, and tear him to pieces, yet we then say to him, “We will strike you with a sword”?! This is not justice. Allah, Most High, says: “Indeed, Allah commands justice and excellence” [al-Nahl 16:90].
The exception is when he killed him by an unlawful means, in which case we do not kill him by that means—for example, if he killed him through sodomy, may Allah protect us, or through sorcery, or by making him drink wine until he dies. The same is not done to him.
Some have said: Rather, the same should be done to him even if it is unlawful. Yet we do not commit what is unlawful. Thus, for example, if he killed him through sodomy or the like, we would insert a piece of wood into his anus until he dies. In any case, such rare cases may be excluded. But if he crushed his head between two stones, slaughtered him with a dull knife, killed him by electric shock, or burned him with fire, then the correct view—without doubt—is that the same should be done to him as he did.