一いっ寸すんの虫むしにも五ご分ぶの魂たましい

expression

even a tiny bug will defend itself; tread on a worm and it will turn

Proverb meaning that even the smallest, weakest beings have their own will and should not be underestimated or mistreated.

• 一いっ寸すんの虫むしにも五ご分ぶの魂たましいというから、弱よわい者ものでも侮あなどってはいけない。

  As the saying goes, even a tiny bug will defend itself, so you shouldn't look down on the weak.