宰予昼寝

zǎi yǔ zhòu qǐn

Zai Yu sleeps by day (idiom); refers to story in Analects of Confucius remonstrating bitterly with his student for sleeping during lectures

宰

zǎi

to slaughter; to butcher; to kill (animals etc)

予

yǔ

(literary) to give

昼

zhòu

daytime

寝

qǐn

old variant of 寢|寝[qin3]