וּבְנֵ֣י צִיּ֗וֹן גִּ֤ילוּ וְשִׂמְחוּ֙ בַּיהוָ֣ה אֱלֹֽהֵיכֶ֔ם כִּֽי־נָתַ֥ן לָכֶ֛ם אֶת־הַמּוֹרֶ֖ה לִצְדָקָ֑ה וַיּ֣וֹרֶד לָכֶ֗ם גֶּ֛שֶׁם מוֹרֶ֥ה וּמַלְק֖וֹשׁ בָּרִאשֽׁוֹן׃
Alegrai-vos, pois, filhos de Sião, e regozijai-vos no SENHOR vosso Deus; porque ele vos dá em justa medida a chuva temporã, e faz descer abundante chuva, a temporã e a serôdia, como dantes.
Rashi on Joel
the teacher for justification Heb. מוֹרֶה. Your prophets who teach you to return to Me, in order to justify you.
Ibn Ezra on Joel
And the children: Yefet [ben Ali] said that the instructor (hamoreh) is the prophet that instructs them about the righteous path. And that is why good is coming to them. And it mentioned early rain (moreh) and late rain, as [in] (Judges 15:16), "With the jaw of an ass (chamor), mass (chamor) upon mass"...
Rashi on Joel
the early rain and the late rain. Heb. מוֹרֶה, like (Deut. 11:14) “the early rain (יוֹרֶה) and the late rain (וּמַלְקוֹֹש).”