寢苫枕塊

1. • bed of straw and pillow of clay (idiom)
2. • the correct etiquette for a filial son during the mourning period

Character by character

• 寢(qǐn)lie down to sleep or rest
• 苫(shān)straw mat
• 枕(zhěn)pillow
• 塊(kuài)lump