TT #54 · Parashas Vayechi · Passuk 49:26
The blessings of your father surpass the blessings of my ancestors, to the utmost bounds of the eternal hills; may they rest on the head of Joseph, on the brow of the elect of his brothers.
Torah Temimah cites Shabbos 139a.
English: “A nazirite from his brothers.” Rabbi Malai said in the name of Rabbi Yitzchak of Migdal: From the day Joseph separated from his brothers, he did not taste wine, as it is stated, “and upon the crown of the one separated from his brothers.”
Derash on Yosef’s lifelong separation and abstention from wine.
The verse’s title for Yosef as “nazir” is read as evidence that he abstained from wine from the time he was separated from his brothers.