A monarch's dreams often speak in the geographic and cultural language of his own land, using familiar symbols to deliver a fateful message about the economic future. The image of cows emerging from the river is not accidental. The Nile River is the exclusive source of life, irrigation, and agriculture in Egypt, serving as the very origin of both abundance and famine [רמב״ן, רד״ק, דעת זקנים]. Their emergence from the water emphasizes that the animals did not merely walk through the river; their very existence and creation came from it, as the rise and fall of the waters would entirely dictate the fate of the coming years [אור החיים]. Furthermore, God chose to deliver His message using the exact elements that the Egyptians worshipped, specifically the Nile and the cow [מלבי״ם, אם למקרא].
The choice of cows was meant to symbolize plowing and working the land. To ensure the Egyptian king would not mistakenly interpret the vision as a prediction of military victories or the conquest of other nations, stalks of grain appeared immediately afterward, clarifying that the message was strictly agricultural [רמב״ן, הטור הארוך].
The physical beauty of the animals offers a profound social and psychological hint about a period of abundance. During years of plenty, people are kind to one another, greeting their friends with generosity and a pleasant demeanor, free from the envy and hostility that characterize times of starvation [רש״י, כלי יקר, מזרחי]. The animals were also completely full of flesh [ביאור שטיינזלץ], and their robust health directly mirrored the health of the people who would eventually feed from that same source of plenty [כלי יקר].
As they grazed, the location itself carried multiple layers of meaning. Some commentators understand the grazing area as a marsh or lake filled with reeds [רש״י, שד״ל], while others view it more broadly as a lush valley of pasture growing along the riverbank [רמב״ן, רשב״ם, אבן עזרא]. An intriguing perspective connects the grazing pasture to the concept of brotherhood. Just as the marsh grasses grow closely together in a unified cluster, the animals grazed together in peace and unity, reflecting the harmony of a society enjoying economic prosperity [אבן עזרא, הכתב והקבלה, רש ר הירש].
Geographically, the fact that the grazing took place right next to the river suggests that the years of plenty would be limited strictly to Egypt, unlike the upcoming famine which would strike all surrounding lands [רמב״ן, העמק דבר]. Finally, the act of grazing itself contained a hidden warning. Because the healthy animals consumed all the available pasture and left nothing behind, the sickly animals that followed were forced to consume them. This served as a vital directive: the people must not exhaust all their resources during the good years, but rather save and store their wealth for the difficult times ahead [רש ר הירש].