"Do not scorn ki zakna imecha," viz.: Do not scorn Boaz, saying that he acted of his own volition; but learn miziknei umathecha ("the elders of your people"). He has authority to reply upon, viz.: "It is time to act for God; they have voided your Torah," which R. Nathan interpreted, etc., i.e.: Sometimes words of Torah are voided in order to act for the sake of God. —

Bartenura's Commentary on 9:5

as in the instance of one greeting his fellow (in the name of God). This, indeed, is the will of God, viz. (Psalms 34:15): "Seek peace and pursue it." It is permitted to "void" Torah and to do something which seems forbidden.]

(9) The general rule in this matter is that a man should examine himself and ask himself which sin he does customarily, and he should hasten to set up fences in order to take care to cease committing that particular transgression. He should also examine himself as to which commandment of God he is lax in. For example, an idler should understand right off that this idleness is a result of his being concerned with idle things. He who attaches himself to idle things will obviously reject Torah and prayer and all that is good. Such a man should depart from people who waste time in idle talk, and he should not be their companion; this will be a cure for his illness. Thus should he act with respect to all bad qualities. He should understand from the start what is at the root of his unworthy conduct and destroy it, thus removing the darkness which darkness the light of his soul. And for all these zeal is required, for if he is too lazy to root out these evil qualities, then they will become fixed in his heart so firmly that he will be unable to uproot them. He should be alert to seek peace and to pursue it. As it is said : "Seek peace and pursue it" (Ps. 34:15).

(1) צדק צדק תרדוף. When you are about to put this legislation into practice, the party in charge of appointing such judges is told by Moses to select only those who are already known for their sense of fair play and righteousness. He will have to look for such people all over the tribe. If potential judges do not have all the qualifications which are desirable in a judge, this qualification of fairness is the overriding quality all must possess.