《汉书·纪·武帝纪》
元光元年冬十一月，开始令郡国推举孝廉各一人。
元光元年冬十一月，初令郡国举孝廉各一人。
On November of the first winter month in the first year of Yuanguang, the court began ordering the counties and states to select a filial and honest person each.