וְהָיָ֣ה אַֽחֲרֵי־כֵ֗ן אֶשְׁפּ֤וֹךְ אֶת־רוּחִי֙ עַל־כָּל־בָּשָׂ֔ר וְנִבְּא֖וּ בְּנֵיכֶ֣ם וּבְנֽוֹתֵיכֶ֑ם זִקְנֵיכֶם֙ חֲלֹמ֣וֹת יַחֲלֹמ֔וּן בַּח֣וּרֵיכֶ֔ם חֶזְיֹנ֖וֹת יִרְאֽוּ׃
Rashi on Joel
upon all flesh—I.e, upon anyone whose heart becomes soft as flesh. Comp. (Ezekiel 36:26) “And I will give you a heart of flesh.”