Musar sur Les Nombres 35:9

עמוד גמילות חסדים . The last of the six pillars which is part of the legislation in our פרשה concerns first and foremost something one does for the dead. The latter cannot repay us as our performance of any service for them is the true rendering of kind deeds. The first such example the Torah deals with in our פרשה concerns the person who has killed inadvertently and is protected against the vengeance of the victim's blood relations by taking refuge in one of the cities set aside for such a purpose (19,2-10). He must remain there until the death of the High Priest during whose tenure the killing occurred, and who represents the attribute of חסד. We have alluded to these details in our commentary on Numbers 35,9-36 where we pointed out the element of חסד inherent in this legislation.