וְהָיָ֣ה אַֽחֲרֵי־כֵ֗ן אֶשְׁפּ֤וֹךְ אֶת־רוּחִי֙ עַל־כָּל־בָּשָׂ֔ר וְנִבְּא֖וּ בְּנֵיכֶ֣ם וּבְנֽוֹתֵיכֶ֑ם זִקְנֵיכֶם֙ חֲלֹמ֣וֹת יַחֲלֹמ֔וּן בַּח֣וּרֵיכֶ֔ם חֶזְיֹנ֖וֹת יִרְאֽוּ׃
And it shall come to pass afterward, That I will pour out My spirit upon all flesh; And your sons and your daughters shall prophesy, Your old men shall dream dreams, Your young men shall see visions;
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.”