וּבְנֵ֣י צִיּ֗וֹן גִּ֤ילוּ וְשִׂמְחוּ֙ בַּיהוָ֣ה אֱלֹֽהֵיכֶ֔ם כִּֽי־נָתַ֥ן לָכֶ֛ם אֶת־הַמּוֹרֶ֖ה לִצְדָקָ֑ה וַיּ֣וֹרֶד לָכֶ֗ם גֶּ֛שֶׁם מוֹרֶ֥ה וּמַלְק֖וֹשׁ בָּרִאשֽׁוֹן׃
Vosotros también, hijos de Sión, alegraos y gozaos en SEÑOR vuestro Dios; porque os ha dado la primera lluvia arregladamente, y hará descender sobre vosotros lluvia temprana y tardía como al principio.
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).”