Musar sobre Génesis 41:5

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.

What all this has to do with Samael injuring the כף ירך יעקב, the thigh joint of Jacob, is simple. Our sages say on 32,26: וירא כי לא יוכל לו, ויגע בכף ירכו ותקע כך ירך יעקב, that the thigh joint of Jacob refers to the later descendants who experienced the harsh decrees by the various nations who were their hosts in exile. When the Hasmoneans overcame the Greeks, they reversed this injury, i.e. the כף became a פך a cruse of oil. What had been a vulnerable part of Jacob's ירך now became the solid basis of the candelabra, ירך מנורה.