analects translation by Robert Eno (2015):
16.7 Confucius said, The junzi has three cautions. When he is young and his blood andenergy are not yet settled, he is cautious about sex. When he is in his prime and his blood and energy have newly achieved strength, he is cautious about combativeness. When he is old and his blood and energy are declining, he is cautious about acquisitiveness.