Choose a job you love, and you will never have to work a day in your life.

Confucius (c. 551- c. 479 BC) Chinese philosopher, sage, politician [孔夫子 (Kǒng Fūzǐ, K'ung Fu-tzu, K'ung Fu Tse), 孔子 (Kǒngzǐ, Chungni), 孔丘 (Kǒng Qiū, K'ung Ch'iu)]

(Spurious)

Though it has been included in books of quotations, the earliest connection between this thought and Confucius is found in the mid-1980s. See here and here for more discussion.