《资治通鉴·宋纪·宋纪十五》
癸丑，北魏诏命各太守、县令都要鼓励农民耕田种桑，一郡一县之中，贫富应该互相帮助，家里有两头牛的，应借给没有牛的人一头。
癸丑，魏诏守令劝课农事，同部之内，贫富相通，家有兼牛，通借无者。
On Guichou, the Northern Wei emperor ordered all the prefects and county magistrates to encourage farmers to cultivate the land and plant mulberry trees. Within a prefecture or county, the rich and the poor should help each other. Those with two oxen should lend one to those without oxen.