《墨子·06章 辞过》
国君如果真想百姓增多而厌恶减少，养侍妾就不可不节制。
君实欲民之众而恶其寡，当蓄私不可不节。
If the King truly desires for the number of people to increase and detests a decrease, then the keeping of concubines is not something to be indulged in.