Deuteronomy 23

At any rate [Scripture] says openly, "You shall not loathe Egyptians, since you lived as strangers in Egypt." By Egyptian it means "Gentile," in fact anyone from anywhere in the world. It is further forbidden to think of enemies as enemies, even if they are presently besieging your walls in the effort to capture your city, until you have sent them an envoy to invite them to peace.

[Scripture] orders money to be returned without usury. It is a mark of kindly feeling to help one who has nothing. It is a sign of a hard nature to extort more than one has given. If one has need of your assistance because he has not enough of his own wherewith to repay a debt, is it not a wicked thing to demand under the guise of kindly feeling a larger sum from him who has not the means to pay off a lesser amount?

A wish is a request for blessings from God with a promise to fulfill a duty. And so, when you obtain what you have asked for, it is ungrateful to delay the promise.

The second mode of breaking a vow occurs through a contrary will, as when someone promises something to God and afterward repents of it. Against such persons it is said in Deuteronomy: "If anything has proceeded from your lips, you shall not make it void."

Let all the servants of God grant [the monks] permission to enter their fields whenever they wish and to depart when well fed and satisfied. This is according to the law given to the people of Israel that no one should arrest a thief in his fields unless he wished to take something away with him. Rather, the owner of the field should permit him who had touched nothing but what he had eaten to depart free and unpunished.