Book 4: 《里仁》 Li Ren (Brotherliness)
《里仁》 Passage 4.21
子曰：「父母之年，不可不知也。一則以喜，一則以懼。」
Legge Translation (1861)
The Master said: "The years of parents may by no means not be kept in the memory, as an occasion at once for joy and for fear."