落ち武者は薄の穂に怖ず
Meanings
1
a fleeing soldier is startled by the slightest thing
Proverb meaning that when you are in a state of fear, even the smallest thing will startle you. Literally: 'a fleeing soldier takes fright even from a head of silver grass.'
As the proverb goes, 'a fleeing soldier is startled by the slightest thing' — when you're scared, you'll be startled by even the most harmless things.