枕戈寝甲 (枕戈寢甲) zhèn gē qǐn jiǎ

zhèn gē qǐn jiǎ set phrase to sleep on one's armor with a spear as a pillow; to keep ready for battle at all times
Domain: Idiom 成语
Notes: (CC-CEDICT '枕戈寢甲')