As the Israelites journeyed along the border of Edom, they received a strict divine directive regarding their conduct. They were commanded to respect the territorial and property rights of the local inhabitants with absolute precision. The primary instruction was a total prohibition against taking plunder or loot. Instead, every necessity, down to the most basic and inexpensive items, had to be purchased willingly and at full price from the sellers [רמב״ן, מלבי״ם, בכור שור]. This requirement extended to buying dry, raw grains—ensuring the Israelites avoided eating meals cooked by foreigners [העמק דבר]—as well as purchasing liquids [נתינה לגר]. While some suggest they were also permitted to physically dig their own water wells [העמק דבר], the primary approach among commentators is that they were strictly expected to acquire everything directly from the local merchants rather than drawing from the land itself [אם למקרא].
A significant question arises as to why the Israelites needed to buy food and water at all, given that they were miraculously sustained by the manna and Miriam's well throughout their years of wandering. One perspective suggests that the instruction was actually a rhetorical question: Did they truly need to purchase sustenance from Edom when God had already blessed them so abundantly that they lacked nothing? [אבן עזרא, רבנו בחיי]. Another approach explains that the purchases were not born out of physical necessity but served a diplomatic and spiritual purpose. The focus was on buying food solely for immediate consumption rather than stockpiling provisions for the journey [הכתב והקבלה, רש״ר הירש]. By paying generously and in full, the Israelites demonstrated to Esau the immense blessing and wealth God had bestowed upon them. This display proved they were entirely self-sufficient, thereby sanctifying God's name [הכתב והקבלה].
The explicit instruction to pay even for water highlights an exceptional level of care. Water is a natural resource typically considered free and ownerless, yet paying for it underscored a profound respect for Edom's property rights [רש״ר הירש]. On a broader scale, this diplomatic approach teaches a timeless lesson in conflict resolution: engaging in fair commerce and offering financial goodwill can calm hostility and bridge the gap with adversaries [תורה תמימה].
On a deeper, historical level, the nature of these instructions serves as a prophecy regarding the future exile of the Jewish people under the rule of Edom, the descendants of Esau. Unlike their life in the Land of Israel, where they would cultivate their own inherited land, the exile would force them to toil endlessly just to purchase expensive food from foreign nations. The narrative hints at a harsh reality of extortion: even after the Jewish people would pay for food or dig their own wells, the local authorities would confiscate their provisions, forcing them to pay repeatedly simply to eat and drink. This difficult existence in exile is understood as part of a divine plan. God allows Esau to receive his reward in this world for the respect he showed his father, thereby preserving the complete and ultimate reward of the Jewish people for the World to Come [שפתי כהן].