verses 6-8
The Second Sign. - Moses' hand became leprous, and was afterwards cleansed again. The expression כּשּׁלג מצרעת, covered with leprosy like snow, refers to the white leprosy (vid., Lev 13:3). - “Was turned again as his flesh;” i.e., was restored, became healthy, or clean like the rest of his body. So far as the meaning of this sign is concerned, Moses' hand has been explained in a perfectly arbitrary manner as representing the Israelitish nation, and his bosom as representing first Egypt, and then Canaan, as the hiding-place of Israel. If the shepherd's staff represented Moses' calling, the hand was that which directed or ruled the calling. It is in the bosom that the nurse carried the sucking child (Num 11:12), the shepherd the lambs (Isa 40:11), and the sacred singer the many nations, from whom he has suffered reproach and injury (Psa 89:50). So Moses also carried his people in his bosom, i.e., in his heart: of that his first appearance in Egypt was a proof (Exo 2:11-12). But now he was to set his hand to deliver them from the reproach and bondage of Egypt. He put (הביא) his hand into his bosom, and his hand was covered with leprosy. The nation was like a leper, who defiled every one that touched him. The leprosy represented not only “the servitude and contemptuous treatment of the Israelites in Egypt” (Kurtz), but the ἀσέβεια of the Egyptians also, as Theodoret expresses it, or rather the impurity of Egypt in which Israel was sunken. This Moses soon discovered (cf. Exo 5:17.), and on more than one occasion afterwards (cf. Num 11); ); so that he had to complain to Jehovah, “Wherefore hast Thou afflicted Thy servant, that Thou layest the burden of all this people upon me?...Have I conceived all this people, that Thou shouldest say to me, Carry them in thy bosom?” (Num 11:11-12). But God had the power to purify the nation from this leprosy, and would endow His servant Moses with that power. At the command of God, Moses put his hand, now covered with leprosy, once more into his bosom, and drew it out quite cleansed. This was what Moses was to learn by the sign; whilst Israel also learned that God both could and would deliver it, through the cleansed hand of Moses, from all its bodily and spiritual misery. The object of the first miracle was to exhibit Moses as the man whom Jehovah had called to be the leader of His people; that of the second, to show that, as the messenger of Jehovah, he was furnished with the necessary power
