ちにいてらんをわすれず

治に居て乱を忘れず

表記・読み：治にいて乱を忘れず・ちにいてらんをわすれず

1. 1

   forewarned is forearmed; in fair weather prepare for foul; don't forget war in time of peace

   expressions (phrases, clauses, etc.)proverb