שַׁאֲל֨וּ מֵיְהוָ֤ה מָטָר֙ בְּעֵ֣ת מַלְק֔וֹשׁ יְהוָ֖ה עֹשֶׂ֣ה חֲזִיזִ֑ים וּמְטַר־גֶּ֙שֶׁם֙ יִתֵּ֣ן לָהֶ֔ם לְאִ֖ישׁ עֵ֥שֶׂב בַּשָּׂדֶֽה׃
봄비 때에 여호와 곧 번개를 내는 여호와께 비를 구하라 무리에게 소낙비를 내려서 밭의 채소를 각 사람에게 주리라
Ibn Ezra
The meaning of the word latter rain is known [e.g., Zechariah 10: 1].
Rabbeinu Bahya
ונתתי עשב בשדך, “I will provide grass in your field, etc.” Moses attributed the provision of grass in the field to G’d personally in order to counter the opinions of the people that the world as we know it has been handed over by G’d unconditionally to planetary forces and terrestrial forces encouraging the growth of vegetation. Seeing this was a widely held view, the Torah had to phrase some things in such a way that people will remember that it is only He Who provides the celestial input without which no growth of any sort will manifest itself in our world. David also reminds us of this in Psalms 104,14: “Who makes the grass grow for the cattle, and herbage for man’s labour.” Just as the rainfall is attributed to G’d in verse 14, so the growth of grass is attributed to Him in this verse. The same idea is also expressed in Zecharyah 10,1