וְהִנֵּ֣ה מִן־הַיְאֹ֗ר עֹלֹת֙ שֶׁ֣בַע פָּר֔וֹת יְפ֥וֹת מַרְאֶ֖ה וּבְרִיאֹ֣ת בָּשָׂ֑ר וַתִּרְעֶ֖ינָה בָּאָֽחוּ׃
И вот, вышли из реки семь коров, благодатных и толстых; и они питались тростниковой травой.
Shenei Luchot HaBerit
The word אחד, one, again figures prominently when Joseph interpreted Pharaoh's dream in 41,25. Joseph's rise to power was due to his interpreting Pharaoh's dream as "one." In the dream of the seven ears of corn the Torah emphasized that they all grew on "one" stalk (41, 22). Even the dream of the seven cows alluded to the number "one," since the cows all rose from "one" river. Considering the above factors, we can now understand the comment of Pharaoh that there was no one as נבון וחכם, wise and clever as Joseph. Pharaoh said to Joseph: "After G–d has made known to you, i.e. הודיע, all this, etc.," you clearly command all three elements of wisdom, namely חכמה, בינה, דעת.