Comentario sobre Deuteronómio 33:15

ומראש הררי קדם AND BY THE FIRST THINGS OF THE HILLS OF קדם (taken in the sense of: the hills priority) — the meaning is: and it is blessed through the earliest ripening of the fruits, because its hills are earliest (קדם, "prior") to bring their fruits to maturity. – Another explanation: this tells us that their creation (the creation of the hills in the territory of Joseph) was prior (קדם) to that of all other hills (Sifrei Devarim 353:4).

ומראש הררי קדם, “and from the tops of ancient mountains.” Seeing that fruit growing in the mountains are perceived as superior to those growing in the valley, Moses blesses the fruit of the mountainous regions in the territory of Joseph. [According to the Talmud, the best fruit came from Ginosaur on the shores of Lake Kineret, certainly not a mountainous region but 200 meters below sea-level. Ed.]

Blessed, also, with the first-ripening fruits, etc. Rashi adds the word blessed to indicate that the phrase with the first, etc. is connected with blessed at the beginning of the verses. You might ask what prompted Rashi here to explain that the phrase with the first is connected with blessed at the beginning of the verses, more than the verse With the delight of the sun’s harvest, etc. which is also connected to the beginning of the verses? The answer is that if Rashi did not explain this I might have thought that this verse, With the first of the early mountains, etc. is a separate matter, and means that he should be blessed with the blessing of the Patriarchs who are called mountains and with the blessing of the Matriarchs who are called hills. Therefore he explains that with the first of the early mountains refers to the beginning of the verses that deals with the blessing of his Land. His proof that it refers to the beginning of the verses is because it is written afterwards, And from the sweetness of earth and its fullness, etc. that deals with the blessing of his Land; [this indicates that] all the verses are connected to the beginning of the verses.