Comentario citado sobre Jeremías 4:24

הקלוקל, as in Ezekiel 21,26: קלקל בחצים, “like flashing arrows,” a simile for the word בדולח, “shining crystal,” a word used by the Torah to describe the appearance of the manna in Numbers 11,7. An alternate interpretation: the word is a variation of קלקול, as in Jeremiah 4,24: וכל הגבעות התקלקלו, “and all the heights, (low hills) are disintegrating.” They are not providing man with strength.

he flashed with the arrows Menachem (p. 155), connected it with (above 1:7): “burnished (קָלָל) copper”; (Ecc. 10:10): “and he did not sharpen (קִלְקֵל) the edge.” It may also be explained as an expression of deterioration, as in (Jer. 4:24): “and all the hills deteriorated (הִתְקַלְקָלוּ).” Some translate קִלְקַל into French, as trait, he shot, and Jonathan as well renders קִלְקַל בֲּחִצִים as קְשֲּׁתבְּגִרְרֲיָא.