Musar su Numeri 32:38

הבער,מבעה,בור,שור, are the four principal causes of damage injury or death. We find in Numbers 32,38, that there was a Canaanite city called Sivmah (same letters as the first letters of the four categories of damage). The four causes of damage are related to the four kinds of קליפות "peels" mentioned in Psalms 78,28,"והוא רחום.” They are: חמה, אף, משחית, עון, names by which G–ds destructive agents are known to us. The word מבעה, meaning damage caused by the teeth, i.e. eating what does not belong to one, is something man is judged on when already in his grave, as our sages explain on Maleachi 2,3, וזריתי פרש … פרש חגיכם, that man will be judged in the grave for what he ate illegally while on earth (Shabbat 151). The category of damage known as שור, refers to the "horns" of Samael (Satan), i.e. the evil urge. The first letters of the words שור, קרן, רגל, spell שקר, lie. The fourth category, fire, i.e. אש also known as hav-er - refers to the fire of purgatory, גהינם.