(21) The sons of Israel did so; Joseph gave them wagons as Pharaoh had commanded, and he supplied them with provisions for the journey. (22) To each of them, moreover, he gave a change of clothing; but to Benjamin he gave three hundred pieces of silver and five changes of clothing. (23) And to his father he sent the following: ten he-asses laden with the best things of Egypt, and ten she-asses laden with grain, bread, and provisions for his father on the journey.
מַאי ״מִטּוּב מִצְרָיִם״?
אָמַר רַבִּי בִּנְיָמִין בַּר יֶפֶת אָמַר רַבִּי אֶלְעָזָר: שיגר לוֹ יַיִן, שֶׁדַּעַת זְקֵנִים נוֹחָה הֵימֶנּוּ.
What are “the good things of Egypt”?
Rabbi Binyamin bar Yefet said: "Rabbi Elazar said: 'He sent him wine, which the elderly find pleasing.'"
שיגר (or שגר) is the term found in many manuscripts (see MS Vatican 134, MS Oxford Opp. Add. fol. 23 (366), MS Goettingen 3, MS NY- Columbia X 893 T 141, MS Munich 95), while MS Munich 140 and printed editions (Pesaro, Venice, & Vilna) witness שלח instead of שיגר
It seems to have gotten inserted here as שלח was used in the previous line and got accidentally copied here
All of the scripts witness יין - only the Vilna edition has יין ישן - clearly an addition
Rabbi Shlomo Yitzḥaki (1040-1105)
מטוב מצרים OF THE BEST THINGS OF EGYPT — We find in the Talmud that he sent him old wine which old people like very much (Megillah 16b), and the Midrash states that he sent him split beans. (Genesis Rabbah 94:2).
זֹאת עֲשׂוּ, וּקְחוּ אֶת אֲבִיכֶם וגו' אֶת טוּב (בראשית מה, יז יח), זֶה גְּרִיס שֶׁל פּוֹל שֶׁהוּא עַל עִיקַת נֶפֶשׁ.
“Do this…and take your father…the finest” – this is split beans, which are effective in soothing the uneasiness of the soul.
Siftei Ḥakhamim (17th-century supercommentary on Rashi)
Rabbi Shabbethai ben Yoseph Bass (1641–1718)
יין ישן שדעת זקנים נוחה הימנו. כתב מהרש"ל מדלא כתיב בקרא מהו הטוב ששלח לו שמע מינה הוא דבר שאינו חשוב ולמה שלח לו לפי שליעקב היה טוב לכן פירש שהוא יין ישן שזה אינו דבר חשוב כל כך וליעקב היה דבר חשוב לפי שדעת זקנים נוחה ממנו וכו' עכ"ל:
Aged wine from which old people derive pleasure. Rabbi Shlomoh Luria (1510-1573) wrote: "[Rashi knows this] because it is not written what was the good thing that Yosef sent him, implying it was not something notable. So why did he send it to him? Because for Yaakov it was good. Therefore, Rashi explains it was aged wine which is generally not so notable, but it was noteworthy to Yaakov because old people derive pleasure from it."