"Retaliation is obligatory (A: if the person entitled wishes to take it (dis: o3.8)) against anyone who kills a human being purely intentionally and without right.... o1.2 The following are not subject to retaliation: -1- a child or insane person, under any circumstances -2- a Muslim for killing a non-Muslim; -3- a Jewish or Christian subject of the Islamic state for killing an apostate from Islam (O: because a subject of the state is under its protection, while killing an apostate from Islam is without consequences); -4- A father or mother (or their fathers of mothers) for killing their offspring, or offspring's offspring."