בטח בדד. כָּל יָחִיד וְיָחִיד אִישׁ תַּחַת גַּפְנוֹ וְתַחַת תְּאֵנָתוֹ מְפֻזָּרִין וְאֵין צְרִיכִין לְהִתְאַסֵּף וְלֵישֵׁב יַחַד מִפְּנֵי הָאוֹיֵב: בטח בדד [THEREFORE ISRAEL DWELT] IN SAFETY, ALONE — This means, every individual dwelling “each under his vine and under his fig-treeבטח) ״; cf. 1 Kings 5:5 where the words Rashi quotes are preceded by לבטח), separated one from another (בדד, “alone”), because after the enemy was driven out, as stated in the preceding verse, they had no need to come together and to dwell in company on account of the enemy.
עין יעקב. כְּמוֹ "וְעֵינוֹ כְּעֵין הַבְּדֹלַח" (במדבר י"א) כְּעֵין הַבְּרָכָה שֶׁבֵּרְכָם יַעֲקֹב, לֹא כְבָדָד שֶׁאָמַר יִרְמְיָה "בָּדָד יָשַׁבְתִּי" (ירמיהו ט"ו), אֶלָּא כְּעֵין הַבְטָחָה שֶׁהִבְטִיחָם יַעֲקֹב (בראשית מ"ח) "וְהָיָה אֱלֹהִים עִמָּכֶם וְהֵשִׁיב אֶתְכֶם אֶל אֶרֶץ אֲבֹתֵיכֶם" (עי' ספרי): עין יעקב — The word עין has the same meaning here as in (Numbers 11:7) “And its appearance (עינו) was as the appearance (עין) of crystal” (i.e., the word עין is used as a term of comparison, “as”, ”like”). The meaning is: And Israel dwelt alone like the blessing with which Jacob blessed them (cf. Targum); not like the בדד which Jeremiah used, (Jeremiah 15:17), viz., “I sat alone (בדד) [because of thy hand, for thou hast filled me with Thy indignation]”, but like the assurance which Jacob gave them, (Genesis 48:20) “And God shall be with you, and bring you back to the land of your fathers” (cf. Sifrei Devarim 356:6).
יערפו. יִטְּפוּ: יערפו means THEY WILL DRIP.
אַף שמיו יערפו טל. אַף בִּרְכָתוֹ שֶׁל יִצְחָק נוֹסֶפֶת עַל בִּרְכָתוֹ שֶׁל יַעֲקֹב "וְיִתֶּן לְךָ הָאֱלֹהִים מִטַּל הַשָּׁמַיִם וְגוֹ'": אף שמיו יערפו טל ALSO HIS HEAVENS SHALL DRIP DEW — Also Isaac’s blessing will be added to Jacob’s blessing: “And God shall give thee of the dew of heaven, etc.” (Genesis 27:28) (cf. Sifrei Devarim 356:7).