Jerusalem Talmud Nazir
HALAKHAH: Rebbi Yannai said: It is written192Is. 7:25.: “To all the hills which are to be worked by the harrow the fear of worm193A rock-splitting worm used by King Solomon to quarry the stones for the Temple without iron implements (Soṭah 9:13/14, Note 219.) and snail will not come.” Just as the stalk fears the iron, so the hair fears the iron194For him, מוֹרָה also is derived from the root ירא..