《礼记·曲礼上》
男子长到十岁叫做幼，这时候该出外上学了；二十岁叫做弱，这时候就该加冠了；三十岁叫做壮，这时候就该娶妻了；四十岁叫做强，这时候就该做官了；五十岁叫做艾，这时候就该参与国家政事了；六十岁叫做耆，这时候就该役使他人了；七十岁叫做老，这时候就该把家事交给儿孙掌管了；八九十岁的人叫做耄；七岁的孩子叫做悼。被称为耄与悼的老人和幼儿，即令有罪，也不对他们判刑。
人生十年曰幼，学。二十曰弱，冠。三十曰壮，有室。四十曰强，而仕。五十曰艾，服官政。六十曰耆，指使。七十曰老，而传。八十、九十曰耄，七年曰悼，悼与耄虽有罪，不加刑焉。
In males, at the age of ten, he was called "young", at which time he should go out to study; at the age of twenty, he was called "weak", at which time he should be given the crown; at the age of thirty, he was called "strong", at which time he should marry; at the age of forty, he was called "strong", at which time he should become an official; at the age of fifty, he was called "Ai", at which time he should participate in the political affairs of the state; at the age of sixty, he was called "Qizhi", at which time he should serve others; at the age of seventy, he was called "old", at which time he should hand over the family property to his children and grandchildren; at the age of eighty or ninety, he was called "white"; a seven-year-old child was called "mourning". The elderly and children known as the old and the mourning, even if they were guilty, would not be sentenced.