בראשית, פרק כ״ז, פסוק ט״ז

A mother wraps her son in animal skins to deceive her blind husband, a dramatic act of disguise that ultimately determines the future of their family. To execute this plan, Rebecca fashioned the skins into sleeves, covering Jacob’s exposed skin to trick Isaac’s failing senses of touch and smell [ביאור שטיינזלץ, רד״ק]. She specifically chose goat skins because their coarse, hard texture closely resembles human hair [חזקוני]. This detail highlights just how unusually hairy Esau was by nature, given that the hide of a young goat placed on Jacob's hands and neck felt to Isaac exactly like his eldest son [בכור שור]. Because Jacob had a beard, his face was not completely smooth; however, the sides of his neck were bare, prompting Rebecca to carefully cover those specific areas [שד״ל].

While acts of deception are generally condemned, especially within a family, commentators explain that under these historical circumstances, the ruse was both necessary and commendable. Isaac was not only physically blind but also blinded by Esau’s smooth speech, remaining entirely unaware of his oldest son's wicked actions. Bestowing the blessings upon a wicked person would have only fueled his cruelty, resulting in a curse rather than a blessing. Had Rebecca and Jacob simply told Isaac the truth about Esau, they would have committed the severe sin of slander while causing the elderly father profound grief. Therefore, the disguise was the only viable way to prevent Isaac from blessing a wicked man. Indeed, once Isaac eventually realized the truth of the situation, he willingly and wholeheartedly blessed Jacob [הכתב והקבלה].

Beyond the physical ruse, the garments served a profound spiritual purpose. Jacob represents the inner fruit, while Esau represents the outer shell. By wearing the skins, Jacob temporarily adopted Esau’s exterior shell [שפתי כהן]. This created a unique synthesis: his outward appearance, clothing, and touch were those of Esau, yet his inner essence and voice remained purely Jacob. Through this combination, he became worthy of receiving both the material and spiritual blessings [מלבי״ם]. Furthermore, Isaac originally intended to bless Esau in the hope of inspiring him to repent, knowing that a penitent possesses a passionate thirst for holiness that even a completely righteous person lacks. When Rebecca dressed Jacob as Esau, she enabled Jacob to tap into that intense spiritual yearning of a penitent, a crucial condition for fully realizing the blessings [חומש קה״ת].

However, this act of deception carried painful historical consequences through the principle of measure for measure. Jacob used goat skins to trick his father, and years later, his own sons would use the blood of a goat to deceive him with Joseph’s torn tunic. Isaac’s hesitant question, asking if the man before him was truly his son, hauntingly echoes the future question Jacob's sons would ask him when presenting the bloody coat. This eventual sorrow realized Jacob’s initial fear that the disguise might ultimately bring a curse upon himself rather than a blessing [צרור המור].

Finally, the precise description of the animals used for the skins serves as a fundamental source in Jewish law. By explicitly specifying that these were the kids of goats, the narrative teaches that whenever the law simply mentions a kid, such as in the prohibition against boiling a kid in its mother’s milk, it refers broadly to the offspring of any pure animal, including cows and sheep, rather than goats alone [תורה תמימה].