(Devarim, Ibid. 24) "And of Asher he said": Why is this written? Because it is written (Bereshith 42:2, see above).
"Blessed of sons is Asher": There is no tribe more blessed with sons than Asher.
"He shall be desired of his brothers": He was gracious to his brothers with anfiknon oil and mullets, and they were gracious to him with grain.
Variantly: "He shall be desired of his brothers": When Reuven performed that act (viz. Bereshith 35:22), Asher went and related it to his brothers, who rebuked him, saying "Our brother, is this how you speak of our big brother?" And when Reuven admitted his deed, they were reconciled with him (Asher) — wherefore it is written "He shall be desired of his brothers."