《管子·入国》
代养一个孤儿的，一子免除征役；代养两个，两子免除；三个，全家免除。 掌孤 的官要经常了解情况，一定要了解孤儿的饮食饥寒和身体瘦弱情况而进行救助。
养一孤者一子无征，养二孤者二子无征，养三孤者尽家无征。掌孤数行问之，必知其食饮饥寒身之膌胜而哀怜之。
For each orphan that was cared for, one son would be exempt from military service; for two orphans, two sons would be exempt; for three orphans, the entire household would be exempt. The official in charge of orphans must be constantly aware of the situation and must take action based on the orphans' hunger, cold, and physical condition.