Whole Stones

Rabbi Yochanan ben Yakkai said "It is written: 'You shall build the altar with whole (Shlemot) stones' -(Devarim 27:6)- stones which make peace (Shalom). Now, is this not obvious: If The Holy One, Blessed Be He, said of the altar stones, which cannot see, hear or speak, but help to make peace between Israel and their father in heaven, that we must not treat them harshly, how much more so of one who makes peace between man and wife, between one city and another, between one nation and another, between one kingdom and another, between one family and another, that no harm will befall him." Mekhilta: Shemot 20:22