《明史·志·卷四十八》
冬春之交，罗网不设于川泽；春夏之交，毒药不投放于原野。
冬春之交，罝罛不施川泽；春夏之交，毒药不施原野。
Nets and traps are not set in the rivers and lakes during the transition from winter to spring; poison is not placed in the fields during the transition from spring to summer.