שמות, פרק כ״א, פסוק כ״א

The Torah navigates the complex reality of slavery by balancing a master's authority with the absolute sanctity of human life. When an owner strikes a slave and death does not occur immediately, the law carefully distinguishes between premeditated murder and a disciplinary action that tragically ends in disaster.

The primary approach among commentators is that the required survival period of a day or two does not refer to full calendar days. Rather, it indicates a continuous timeframe of twenty four hours that spans across parts of two different days [רש״י, אבן עזרא, חזקוני, מלבי״ם]. The very fact that the slave survives for this duration serves as evidence that the blow was not vicious enough to be intended for immediate death [העמק דבר]. Alternatively, this timeframe highlights that even if the slave succumbs on the third day, when physical pain typically reaches its peak, the death is attributed to a new complication rather than the initial strike [כלי יקר]. Another perspective views this simply as a common figure of speech meaning a day or more [קאסוטו].

If the slave survives this critical window, the master is spared execution. The penalty discussed here is not an abstract concept of revenge, but specifically capital punishment carried out by the court using a sword [אבן עזרא, בכור שור]. The court refrains from executing the master based on the slave's status as his financial property, a rationale understood on several levels. Legally, a master possesses the authority to discipline and educate a slave through corrective physical strikes [ספורנו, רשב״ם, בכור שור]. The slave's initial survival proves in retrospect that the master's intent was solely to discipline, not to murder [רבנו בחיי]. Economically, human nature dictates that a person does not intentionally destroy their own property. Because the slave represents a significant financial investment, there is a strong presumption that the master would protect his wealth and not deliver a fatal blow [אבן עזרא, כלי יקר, שד״ל]. Furthermore, the passage of time introduces legal doubt, raising the possibility that the death resulted from a different cause entirely. In such a scenario, the master has already suffered a severe material punishment through the loss of his property [רש ר הירש, קאסוטו].

However, this exemption from capital punishment is restricted by strict conditions. It applies only when the master uses an instrument typically intended for discipline, such as a rod or a strap. If the master uses a lethal weapon like a knife or a sword, the act is treated as outright murder, and the master faces execution regardless of whether the slave survived for a day or two [הכתב והקבלה בשם הרמב״ם].

Moreover, the financial rationale serves as a strict legal boundary, limiting the exemption exclusively to a master who holds complete and sole ownership of the slave. If a stranger strikes the slave, that individual is judged as a standard murderer and faces execution, even if the victim survived for twenty four hours before dying [רש״י, מזרחי, ברכת אשר]. For the exact same reason, the exemption does not apply to a slave owned by partners, a slave who is partially free, or one who is temporarily leased for thirty days, because in these cases, the slave is not the absolute and exclusive property of the attacker [קיצור בעל הטורים, תורה תמימה]. Finally, if a master unintentionally kills his slave, he is treated like any other person who commits accidental manslaughter and must flee to a city of refuge [אור החיים].