It is narrated from Sayyiduna Abu Hujayfah (may Allah be pleased with him), he says: We asked Sayyiduna Ali (may Allah be pleased with him) whether the Messenger of Allah (peace and blessings be upon him) gave you anything besides the Holy Qur'an? He said: No, by Him Who split the grain and created the soul! He gave us nothing except the understanding and insight which Allah grants to a man in the Qur'an, or that which is in this scroll. I asked: What is in it? He said: The issues of blood money (diyah), freeing a captive, and that a Muslim will not be killed in retaliation for a disbeliever.

Narrated by Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The blood of the believers is equal among themselves, they are united in cooperation against their enemies, even the lowest-ranking Muslim has the right to the covenant of all Muslims. Beware! A believer will not be killed in retaliation for a disbeliever, and no dhimmi will be killed during his covenant.

It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) decreed that a Muslim will not be killed in retaliation for a disbeliever. In another narration: The blood money for a disbeliever is equal to half the blood money for a Muslim.

Narrated by Sayyiduna Samurah bin Jundub (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Whoever kills his slave, we will kill him in retaliation, and whoever cuts off a limb of his slave, we will cut off his limb as well. After this, the narrator Hasan forgot and said: The master will not be killed in retaliation for the slave.

(Second chain) It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever castrates his slave, we will castrate him in retribution.