A man should not marry after thirty years of age; should not enter the government service after the age of forty; should not have any more children after the age of fifty; and should not travel after the age of sixty. This is because the proper time for those things has passed.
Authentication Score 3
Original Citation
Shi Nai'an. Water Margin. c. 1524, vol. 1, introduction.
Current Citation
Shi Naian. The Water Margin, translated by J. H. Jackson. Tuttle Publishing, 2010, forward.