《管子·七主七臣》
夏天不要拦塞河水入大川，不填塞大山谷。不大兴土木，不射鸟兽。
夏无遏水达名川，塞大谷，动土功，射鸟兽。
In summer, do not block rivers from entering the great river, and do not fill up large mountain valleys. Do not carry out major construction projects, and do not shoot birds and beasts.