Harming another person's property extends far beyond mere economic loss; it strikes at the fundamental sense of security within a society. The Torah takes a particularly severe stance against the theft and subsequent concealment of livestock, imposing a heavy deterrent penalty. The primary approach among commentators is that the law deals much more harshly with a stealthy thief than with an open robber. A robber acts brazenly in broad daylight, demonstrating that he fears neither man nor God. A thief, however, operates in the shadows. This secrecy reveals a profound flaw in faith, as the thief proves he is afraid of human beings and tries to hide from them, yet he does not fear the watchful eye of God [רא״ש, רבנו בחיי, צאינה וראינה, רש״ר הירש].
The specific focus on livestock stems from the unique vulnerability of these animals. Flocks and herds typically graze in open fields, forests, and mountains, far from residential areas. They simply cannot be guarded with the same level of security as household objects. To deter criminals from taking advantage of these open pastures, a uniquely heavy fine was established [שד״ל, תורה תמימה, אבן עזרא הקצר, קאסוטו, תולדות יצחק]. Furthermore, an animal often serves as a person's primary livelihood, and stealing it while the owner is traveling could place the victim in actual physical danger [תורה תמימה].
This severe penalty does not apply at the exact moment of the theft, which normally incurs only a double payment. The heavier fine is triggered only when the thief completely conceals the animal and prevents its return to the owner, either by altering its physical form through slaughter or by transferring it to another domain through a sale [אור החיים, רש״ר הירש, קאסוטו]. These actions indicate that the thief has become deeply entrenched in his sin, proving he has no intention of repenting or returning the stolen property [תורה תמימה, רש״ר הירש]. Notably, even if the thief does not slaughter or sell the animal himself but sends someone else to do it on his behalf, he still bears full responsibility and must pay the fine [תורה תמימה, רש״ר הירש]. For the penalty to take effect, the transaction or slaughter must be absolute, ruling out partial or temporary sales [תורה תמימה, חזקוני, מלבי״ם].
A distinct difference in the penalty exists depending on the type of animal stolen, with five animals paid for an ox and four for a sheep. Commentators present two complementary approaches to explain this distinction. One approach focuses on the severe economic damage inflicted upon the owner. An ox is a central work animal used for plowing and carrying loads. Stealing an ox causes not only a loss of property but also an ongoing disruption of the owner's livelihood, justifying a higher penalty, whereas a sheep is not used for daily agricultural labor [רש״י, רשב״ם, שד״ל, רבנו בחיי, תורה תמימה, אבן עזרא הקצר, דברי דוד]. Additionally, raising an ox requires significantly more toil and investment [בכור שור, קאסוטו], and stealing such a large animal demands greater audacity and professional skill [אבן עזרא, חזקוני].
The second approach highlights the profound value of human dignity. God cares for the honor of all people, even that of a thief. An ox can be easily led away on foot without causing the thief any embarrassment. A small sheep, however, must be carried away on the thief's shoulders, forcing him to endure public degradation. Because the thief has already suffered humiliation during the act of stealing, his penalty is reduced by one animal [רש״י, רבנו בחיי, תורה תמימה, צאינה וראינה, תולדות יצחק, חזקוני, חתם סופר].
This strict fourfold and fivefold penalty is highly specific, applying exclusively to oxen and sheep, and not to other animals, birds, or inanimate objects [רש״י, מזרחי, גור אריה, תורה תמימה, חזקוני, ברטנורא, מלבי״ם]. When making restitution, the thief is required to provide healthy, good animals equal in value to the one he stole, and he cannot exempt himself by paying with weak or emaciated livestock [תורה תמימה]. On a deeper, Midrashic level, the numbers four and five represent a profound historical correction rather than just a financial fine. The payment of five oxen alludes to the sin of the Golden Calf, for which the Israelites suffered five distinct punishments throughout history. Conversely, the payment of four sheep hints at the selling of Joseph, who is compared to a sheep, a historical sin that ultimately led to four hundred years of exile and slavery in Egypt [רבנו בחיי, צאינה וראינה].