Comentario sobre Joel 2:18

And the Lord was zealous for His land Heb. וַיְקַנֵּא, an expression similar to (Num. 11:29) “Are you zealous (הַמְקַנֵּא) for me?” Their distress entered His heart, and He fought their battle and engaged in their necessities. Our Sages explain it as an expression of warning. He warned the locusts concerning His land. [from Sotah 3a]