Musar su Levitico 11:7

Moses said afterwards: -"Not a hoof will remain;" this was an allusion to the other "temporary" first-born, the spiritual representative of Esau, otherwise known as Edom. There is a special sign which proves that this שר has a hold on a holy domain. It is known that Esau is also called חזיר, the pig. The source for this is Psalms 80,14: יכרסמנה חזיר מיער וזיז שדי ירענה, "Wild boars gnaw at it and creatures of the field feed on it." The pig is known to stretch out its hooves as if to demonstrate that it possesses the marks of purity [Leviticus 11,7, although it does not chew the cud, the other mark of purity required. Ed.]. When the Torah describes Jacob as holding on to the heel of Esau at the time he was born, this is allegorical. It means that Esau does possess one mark of purity, and it is this mark of purity, his heel, read: its hoof, to which Jacob cleaves. Moses alluded to this mark of purity of Esau when he said that he would not leave a hoof in Egypt, "for from it we shall take to sacrifice to the Lord our G–d." This verse is parallel to the earlier verse in which Moses described how Israel would offer sacrifices on behalf of Pharaoh, or the שר של מצרים. The words "from it," indicate that something of Esau's is fit to be rendered as an offering to G–d. Israel would benefit from this, but Moses was not yet sure how and when that benefit would accrue to Israel, i.e. "we do not know what we shall serve the Lord until the time comes to prepare the offering." The basic benefit we derive from our own sacrifices cannot be assessed until the Hereafter, since no human eye has beheld the glory in store for us there. The true dimension of spiritual benefit reserved for us is known only to G–d Himself.