(14:1, 2) God spoke to Moses, saying: This is the law concerning the leper when he is purified; he shall be brought to the priest.
This is the law concerning the leper Resh Lakish said: What is meant by “This is the law concerning the leper [metzora]”? It means: This shall be the law for a person who slanders, motzi shem ra (Arachin 15b).
NOTE: The word metzora, “leper, ” is seen as a contraction of motzi shem ra, “slanderer.” Thus, the law of the slanderer is that he shall be punished with leprosy.
(14:4) The priest shall then order that for the person undergoing purification there be taken two live kosher birds, some crimson wool, and a hyssop branch.
two … birds R. Yehoshua b. Levi said: In what way is the leper singled out that the Torah said about him, “He should bring two live kosher birds” so that he will become pure again?